How to fscanf a file into a multi-dimensional array












0















Scenario: I have a file in following format.



@209.161.198.176/28 209.161.198.160/28 88 : 88 80 : 80 0x11/0xFF
@203.124.178.48/28 203.124.183.192/28 123 : 123 23 : 23 0x11/0xFF
@175.54.90.240/28 209.161.199.160/28 53 : 53 21 : 21 0x11/0xFF
@175.54.96.176/28 209.161.199.160/28 123 : 123 544 : 544 0x11/0xFF
@5.220.189.176/28 5.220.186.176/28 750 : 750 123 : 123 0x11/0xFF
.../*and the file contain about 100000 lines*/


Every line can be divided into 5 sections.



//For example:
(@209.161.198.176/28) (209.161.198.160/28) (88 : 88) (80 : 80) (00x11/0xFF)


I need to read the file and store it into 5 multi-dimensional arrays for each section. The first dimension will be which line it is, the second will store its string value.



//For example, the array to store the first section might have the following structure:
[line0][@209.161.198.176/28]
[line1][@203.124.178.48/28]
[line2][@175.54.90.240/28]
...
(array[line][string])


The problem is that I always get segmentation fault and I don't know why.



Here's my current code:



#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv){
FILE *f;
char file1[100000][100], file2[100000][100], file3[100000][100], file4[100000][100], file5[100000][100];

char file = argv[1];
f = fopen(file,"r");
fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);
printf("%c%c",fike1[0][0],file1[0][1]);
fclose(f);

return 0;
}


At line 10, I try to read the first line. At line 11, I try to print out the first 2 character of line-0's first section.



The possible problem I can think of is:



1) I can't fopen argv[1] directly like this.



2) Maybe I need to add * or & somewhere but I can't find it.



(OAO)










share|improve this question




















  • 2





    Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

    – Chris Turner
    Nov 22 '18 at 16:40






  • 1





    1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

    – Swordfish
    Nov 22 '18 at 16:44













  • Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

    – EsmaeelE
    Nov 22 '18 at 17:13
















0















Scenario: I have a file in following format.



@209.161.198.176/28 209.161.198.160/28 88 : 88 80 : 80 0x11/0xFF
@203.124.178.48/28 203.124.183.192/28 123 : 123 23 : 23 0x11/0xFF
@175.54.90.240/28 209.161.199.160/28 53 : 53 21 : 21 0x11/0xFF
@175.54.96.176/28 209.161.199.160/28 123 : 123 544 : 544 0x11/0xFF
@5.220.189.176/28 5.220.186.176/28 750 : 750 123 : 123 0x11/0xFF
.../*and the file contain about 100000 lines*/


Every line can be divided into 5 sections.



//For example:
(@209.161.198.176/28) (209.161.198.160/28) (88 : 88) (80 : 80) (00x11/0xFF)


I need to read the file and store it into 5 multi-dimensional arrays for each section. The first dimension will be which line it is, the second will store its string value.



//For example, the array to store the first section might have the following structure:
[line0][@209.161.198.176/28]
[line1][@203.124.178.48/28]
[line2][@175.54.90.240/28]
...
(array[line][string])


The problem is that I always get segmentation fault and I don't know why.



Here's my current code:



#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv){
FILE *f;
char file1[100000][100], file2[100000][100], file3[100000][100], file4[100000][100], file5[100000][100];

char file = argv[1];
f = fopen(file,"r");
fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);
printf("%c%c",fike1[0][0],file1[0][1]);
fclose(f);

return 0;
}


At line 10, I try to read the first line. At line 11, I try to print out the first 2 character of line-0's first section.



The possible problem I can think of is:



1) I can't fopen argv[1] directly like this.



2) Maybe I need to add * or & somewhere but I can't find it.



(OAO)










share|improve this question




















  • 2





    Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

    – Chris Turner
    Nov 22 '18 at 16:40






  • 1





    1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

    – Swordfish
    Nov 22 '18 at 16:44













  • Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

    – EsmaeelE
    Nov 22 '18 at 17:13














0












0








0








Scenario: I have a file in following format.



@209.161.198.176/28 209.161.198.160/28 88 : 88 80 : 80 0x11/0xFF
@203.124.178.48/28 203.124.183.192/28 123 : 123 23 : 23 0x11/0xFF
@175.54.90.240/28 209.161.199.160/28 53 : 53 21 : 21 0x11/0xFF
@175.54.96.176/28 209.161.199.160/28 123 : 123 544 : 544 0x11/0xFF
@5.220.189.176/28 5.220.186.176/28 750 : 750 123 : 123 0x11/0xFF
.../*and the file contain about 100000 lines*/


Every line can be divided into 5 sections.



//For example:
(@209.161.198.176/28) (209.161.198.160/28) (88 : 88) (80 : 80) (00x11/0xFF)


I need to read the file and store it into 5 multi-dimensional arrays for each section. The first dimension will be which line it is, the second will store its string value.



//For example, the array to store the first section might have the following structure:
[line0][@209.161.198.176/28]
[line1][@203.124.178.48/28]
[line2][@175.54.90.240/28]
...
(array[line][string])


The problem is that I always get segmentation fault and I don't know why.



Here's my current code:



#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv){
FILE *f;
char file1[100000][100], file2[100000][100], file3[100000][100], file4[100000][100], file5[100000][100];

char file = argv[1];
f = fopen(file,"r");
fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);
printf("%c%c",fike1[0][0],file1[0][1]);
fclose(f);

return 0;
}


At line 10, I try to read the first line. At line 11, I try to print out the first 2 character of line-0's first section.



The possible problem I can think of is:



1) I can't fopen argv[1] directly like this.



2) Maybe I need to add * or & somewhere but I can't find it.



(OAO)










share|improve this question
















Scenario: I have a file in following format.



@209.161.198.176/28 209.161.198.160/28 88 : 88 80 : 80 0x11/0xFF
@203.124.178.48/28 203.124.183.192/28 123 : 123 23 : 23 0x11/0xFF
@175.54.90.240/28 209.161.199.160/28 53 : 53 21 : 21 0x11/0xFF
@175.54.96.176/28 209.161.199.160/28 123 : 123 544 : 544 0x11/0xFF
@5.220.189.176/28 5.220.186.176/28 750 : 750 123 : 123 0x11/0xFF
.../*and the file contain about 100000 lines*/


Every line can be divided into 5 sections.



//For example:
(@209.161.198.176/28) (209.161.198.160/28) (88 : 88) (80 : 80) (00x11/0xFF)


I need to read the file and store it into 5 multi-dimensional arrays for each section. The first dimension will be which line it is, the second will store its string value.



//For example, the array to store the first section might have the following structure:
[line0][@209.161.198.176/28]
[line1][@203.124.178.48/28]
[line2][@175.54.90.240/28]
...
(array[line][string])


The problem is that I always get segmentation fault and I don't know why.



Here's my current code:



#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv){
FILE *f;
char file1[100000][100], file2[100000][100], file3[100000][100], file4[100000][100], file5[100000][100];

char file = argv[1];
f = fopen(file,"r");
fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);
printf("%c%c",fike1[0][0],file1[0][1]);
fclose(f);

return 0;
}


At line 10, I try to read the first line. At line 11, I try to print out the first 2 character of line-0's first section.



The possible problem I can think of is:



1) I can't fopen argv[1] directly like this.



2) Maybe I need to add * or & somewhere but I can't find it.



(OAO)







c arrays multidimensional-array scanf argv






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 23 '18 at 8:58







Buzzuka

















asked Nov 22 '18 at 16:33









BuzzukaBuzzuka

53




53








  • 2





    Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

    – Chris Turner
    Nov 22 '18 at 16:40






  • 1





    1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

    – Swordfish
    Nov 22 '18 at 16:44













  • Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

    – EsmaeelE
    Nov 22 '18 at 17:13














  • 2





    Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

    – Chris Turner
    Nov 22 '18 at 16:40






  • 1





    1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

    – Swordfish
    Nov 22 '18 at 16:44













  • Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

    – EsmaeelE
    Nov 22 '18 at 17:13








2




2





Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

– Chris Turner
Nov 22 '18 at 16:40





Lots of problems with the code, most notably you don't declare file or test so I'm not sure how it would even compile?

– Chris Turner
Nov 22 '18 at 16:40




1




1





1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

– Swordfish
Nov 22 '18 at 16:44







1) [...] – No, you can't. Use fopen() to open the file and make sure to check the returned value for errors. You might want to check the value of argc as well. Use fclose() when you are done with the file. Also, "%s %s %s %s %s" won't work for the format you want since "%s" reads until the next whitespace. Some of the parts like "88 : 88" you want to keep together however contain whitespace.

– Swordfish
Nov 22 '18 at 16:44















Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

– EsmaeelE
Nov 22 '18 at 17:13





Many error in code, use:f = fopen(argv[1],"r"); fscanf(f,"%s %s %s %s %s", file1[0], file2[0], file3[0], file4[0], file5[0]);

– EsmaeelE
Nov 22 '18 at 17:13












1 Answer
1






active

oldest

votes


















0














fgets could be used to read each line, then parse the line for the five sections.

The first two sections are easily parsed using sscanf. The %n specifier will report the number of characters processed by the scan. Use that number as a offset for further parsing.

The third and fourth sections are difficult as they contain spaces and are separated by spaces. sscanf could be used but smaller sections would need to be parsed and concatenated into the full section.
strspn would be an option to count groups of matching characters then strncpy the counted characters.

Having a count of all the characters processed makes parsing the last section easy with sscanf.

A three dimension array keeps all the lines and sections together.

A structure would be another way of organizing the data.



#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define LINES 1000
#define SECTIONS 5
#define SIZE 99
//lenstr so SIZE can be part of sscanf Format String
#define FS_(x) #x
#define FS(x) FS_(x)

int main( int argc, char *argv) {
char input[SIZE + 1] = "";//SIZE + 1 to allow for zero terminator
char record[LINES][SECTIONS][SIZE + 1] = { { { 0}}};
char *digits = "0123456789";
char *colon = " :";
int offset = 0;
int span = 0;
FILE* pf = NULL;

if ( 2 != argc) {
fprintf ( stderr, "useage:nt%s filenamen", argv[0]);
return 0;
}

if ( NULL == ( pf = fopen ( argv[1], "r"))) {
fprintf ( stderr, "could not open %sn", argv[1]);
return 0;
}

int line = 0;
while ( LINES > line && fgets ( input, sizeof input, pf)) {
span = 0;
if ( 2 == sscanf ( input, "%"FS(SIZE)"s%"FS(SIZE)"s%n", record[line][0], record[line][1], &offset)) {
for ( int each = 2; each < 4; ++each) {//loop for sections 2 and 3
if ( ! ( span = strspn ( &input[offset], " "))) {//count spaces
break;
}
offset += span;//skip spaces
span = strspn ( &input[offset], digits);//count digits
span += strspn ( &input[offset + span], colon);//count colon and spaces
span += strspn ( &input[offset + span], digits);//count digits
if ( ! span || SIZE < span) {
break;
}
strncpy ( record[line][each], &input[offset], span);//copy span number of characters
record[line][each][span] = 0;//zero terminate

offset += span;//advance offset to next section
}

if ( span && SIZE > span) {
sscanf ( &input[offset], "%"FS(SIZE)"s", record[line][4]);
line++;
if ( line >= LINES) {
break;
}
}
}
}

fclose ( pf);

for ( int item = 0; item < line; ++item) {
for ( int each = 0; each < SECTIONS; ++each) {
printf ( "record[%d][%d] %sn", item, each, record[item][each]);
}
printf ( "n");
}

return 0;
}





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    fgets could be used to read each line, then parse the line for the five sections.

    The first two sections are easily parsed using sscanf. The %n specifier will report the number of characters processed by the scan. Use that number as a offset for further parsing.

    The third and fourth sections are difficult as they contain spaces and are separated by spaces. sscanf could be used but smaller sections would need to be parsed and concatenated into the full section.
    strspn would be an option to count groups of matching characters then strncpy the counted characters.

    Having a count of all the characters processed makes parsing the last section easy with sscanf.

    A three dimension array keeps all the lines and sections together.

    A structure would be another way of organizing the data.



    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    #define LINES 1000
    #define SECTIONS 5
    #define SIZE 99
    //lenstr so SIZE can be part of sscanf Format String
    #define FS_(x) #x
    #define FS(x) FS_(x)

    int main( int argc, char *argv) {
    char input[SIZE + 1] = "";//SIZE + 1 to allow for zero terminator
    char record[LINES][SECTIONS][SIZE + 1] = { { { 0}}};
    char *digits = "0123456789";
    char *colon = " :";
    int offset = 0;
    int span = 0;
    FILE* pf = NULL;

    if ( 2 != argc) {
    fprintf ( stderr, "useage:nt%s filenamen", argv[0]);
    return 0;
    }

    if ( NULL == ( pf = fopen ( argv[1], "r"))) {
    fprintf ( stderr, "could not open %sn", argv[1]);
    return 0;
    }

    int line = 0;
    while ( LINES > line && fgets ( input, sizeof input, pf)) {
    span = 0;
    if ( 2 == sscanf ( input, "%"FS(SIZE)"s%"FS(SIZE)"s%n", record[line][0], record[line][1], &offset)) {
    for ( int each = 2; each < 4; ++each) {//loop for sections 2 and 3
    if ( ! ( span = strspn ( &input[offset], " "))) {//count spaces
    break;
    }
    offset += span;//skip spaces
    span = strspn ( &input[offset], digits);//count digits
    span += strspn ( &input[offset + span], colon);//count colon and spaces
    span += strspn ( &input[offset + span], digits);//count digits
    if ( ! span || SIZE < span) {
    break;
    }
    strncpy ( record[line][each], &input[offset], span);//copy span number of characters
    record[line][each][span] = 0;//zero terminate

    offset += span;//advance offset to next section
    }

    if ( span && SIZE > span) {
    sscanf ( &input[offset], "%"FS(SIZE)"s", record[line][4]);
    line++;
    if ( line >= LINES) {
    break;
    }
    }
    }
    }

    fclose ( pf);

    for ( int item = 0; item < line; ++item) {
    for ( int each = 0; each < SECTIONS; ++each) {
    printf ( "record[%d][%d] %sn", item, each, record[item][each]);
    }
    printf ( "n");
    }

    return 0;
    }





    share|improve this answer






























      0














      fgets could be used to read each line, then parse the line for the five sections.

      The first two sections are easily parsed using sscanf. The %n specifier will report the number of characters processed by the scan. Use that number as a offset for further parsing.

      The third and fourth sections are difficult as they contain spaces and are separated by spaces. sscanf could be used but smaller sections would need to be parsed and concatenated into the full section.
      strspn would be an option to count groups of matching characters then strncpy the counted characters.

      Having a count of all the characters processed makes parsing the last section easy with sscanf.

      A three dimension array keeps all the lines and sections together.

      A structure would be another way of organizing the data.



      #include <stdio.h>
      #include <stdlib.h>
      #include <string.h>

      #define LINES 1000
      #define SECTIONS 5
      #define SIZE 99
      //lenstr so SIZE can be part of sscanf Format String
      #define FS_(x) #x
      #define FS(x) FS_(x)

      int main( int argc, char *argv) {
      char input[SIZE + 1] = "";//SIZE + 1 to allow for zero terminator
      char record[LINES][SECTIONS][SIZE + 1] = { { { 0}}};
      char *digits = "0123456789";
      char *colon = " :";
      int offset = 0;
      int span = 0;
      FILE* pf = NULL;

      if ( 2 != argc) {
      fprintf ( stderr, "useage:nt%s filenamen", argv[0]);
      return 0;
      }

      if ( NULL == ( pf = fopen ( argv[1], "r"))) {
      fprintf ( stderr, "could not open %sn", argv[1]);
      return 0;
      }

      int line = 0;
      while ( LINES > line && fgets ( input, sizeof input, pf)) {
      span = 0;
      if ( 2 == sscanf ( input, "%"FS(SIZE)"s%"FS(SIZE)"s%n", record[line][0], record[line][1], &offset)) {
      for ( int each = 2; each < 4; ++each) {//loop for sections 2 and 3
      if ( ! ( span = strspn ( &input[offset], " "))) {//count spaces
      break;
      }
      offset += span;//skip spaces
      span = strspn ( &input[offset], digits);//count digits
      span += strspn ( &input[offset + span], colon);//count colon and spaces
      span += strspn ( &input[offset + span], digits);//count digits
      if ( ! span || SIZE < span) {
      break;
      }
      strncpy ( record[line][each], &input[offset], span);//copy span number of characters
      record[line][each][span] = 0;//zero terminate

      offset += span;//advance offset to next section
      }

      if ( span && SIZE > span) {
      sscanf ( &input[offset], "%"FS(SIZE)"s", record[line][4]);
      line++;
      if ( line >= LINES) {
      break;
      }
      }
      }
      }

      fclose ( pf);

      for ( int item = 0; item < line; ++item) {
      for ( int each = 0; each < SECTIONS; ++each) {
      printf ( "record[%d][%d] %sn", item, each, record[item][each]);
      }
      printf ( "n");
      }

      return 0;
      }





      share|improve this answer




























        0












        0








        0







        fgets could be used to read each line, then parse the line for the five sections.

        The first two sections are easily parsed using sscanf. The %n specifier will report the number of characters processed by the scan. Use that number as a offset for further parsing.

        The third and fourth sections are difficult as they contain spaces and are separated by spaces. sscanf could be used but smaller sections would need to be parsed and concatenated into the full section.
        strspn would be an option to count groups of matching characters then strncpy the counted characters.

        Having a count of all the characters processed makes parsing the last section easy with sscanf.

        A three dimension array keeps all the lines and sections together.

        A structure would be another way of organizing the data.



        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>

        #define LINES 1000
        #define SECTIONS 5
        #define SIZE 99
        //lenstr so SIZE can be part of sscanf Format String
        #define FS_(x) #x
        #define FS(x) FS_(x)

        int main( int argc, char *argv) {
        char input[SIZE + 1] = "";//SIZE + 1 to allow for zero terminator
        char record[LINES][SECTIONS][SIZE + 1] = { { { 0}}};
        char *digits = "0123456789";
        char *colon = " :";
        int offset = 0;
        int span = 0;
        FILE* pf = NULL;

        if ( 2 != argc) {
        fprintf ( stderr, "useage:nt%s filenamen", argv[0]);
        return 0;
        }

        if ( NULL == ( pf = fopen ( argv[1], "r"))) {
        fprintf ( stderr, "could not open %sn", argv[1]);
        return 0;
        }

        int line = 0;
        while ( LINES > line && fgets ( input, sizeof input, pf)) {
        span = 0;
        if ( 2 == sscanf ( input, "%"FS(SIZE)"s%"FS(SIZE)"s%n", record[line][0], record[line][1], &offset)) {
        for ( int each = 2; each < 4; ++each) {//loop for sections 2 and 3
        if ( ! ( span = strspn ( &input[offset], " "))) {//count spaces
        break;
        }
        offset += span;//skip spaces
        span = strspn ( &input[offset], digits);//count digits
        span += strspn ( &input[offset + span], colon);//count colon and spaces
        span += strspn ( &input[offset + span], digits);//count digits
        if ( ! span || SIZE < span) {
        break;
        }
        strncpy ( record[line][each], &input[offset], span);//copy span number of characters
        record[line][each][span] = 0;//zero terminate

        offset += span;//advance offset to next section
        }

        if ( span && SIZE > span) {
        sscanf ( &input[offset], "%"FS(SIZE)"s", record[line][4]);
        line++;
        if ( line >= LINES) {
        break;
        }
        }
        }
        }

        fclose ( pf);

        for ( int item = 0; item < line; ++item) {
        for ( int each = 0; each < SECTIONS; ++each) {
        printf ( "record[%d][%d] %sn", item, each, record[item][each]);
        }
        printf ( "n");
        }

        return 0;
        }





        share|improve this answer















        fgets could be used to read each line, then parse the line for the five sections.

        The first two sections are easily parsed using sscanf. The %n specifier will report the number of characters processed by the scan. Use that number as a offset for further parsing.

        The third and fourth sections are difficult as they contain spaces and are separated by spaces. sscanf could be used but smaller sections would need to be parsed and concatenated into the full section.
        strspn would be an option to count groups of matching characters then strncpy the counted characters.

        Having a count of all the characters processed makes parsing the last section easy with sscanf.

        A three dimension array keeps all the lines and sections together.

        A structure would be another way of organizing the data.



        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>

        #define LINES 1000
        #define SECTIONS 5
        #define SIZE 99
        //lenstr so SIZE can be part of sscanf Format String
        #define FS_(x) #x
        #define FS(x) FS_(x)

        int main( int argc, char *argv) {
        char input[SIZE + 1] = "";//SIZE + 1 to allow for zero terminator
        char record[LINES][SECTIONS][SIZE + 1] = { { { 0}}};
        char *digits = "0123456789";
        char *colon = " :";
        int offset = 0;
        int span = 0;
        FILE* pf = NULL;

        if ( 2 != argc) {
        fprintf ( stderr, "useage:nt%s filenamen", argv[0]);
        return 0;
        }

        if ( NULL == ( pf = fopen ( argv[1], "r"))) {
        fprintf ( stderr, "could not open %sn", argv[1]);
        return 0;
        }

        int line = 0;
        while ( LINES > line && fgets ( input, sizeof input, pf)) {
        span = 0;
        if ( 2 == sscanf ( input, "%"FS(SIZE)"s%"FS(SIZE)"s%n", record[line][0], record[line][1], &offset)) {
        for ( int each = 2; each < 4; ++each) {//loop for sections 2 and 3
        if ( ! ( span = strspn ( &input[offset], " "))) {//count spaces
        break;
        }
        offset += span;//skip spaces
        span = strspn ( &input[offset], digits);//count digits
        span += strspn ( &input[offset + span], colon);//count colon and spaces
        span += strspn ( &input[offset + span], digits);//count digits
        if ( ! span || SIZE < span) {
        break;
        }
        strncpy ( record[line][each], &input[offset], span);//copy span number of characters
        record[line][each][span] = 0;//zero terminate

        offset += span;//advance offset to next section
        }

        if ( span && SIZE > span) {
        sscanf ( &input[offset], "%"FS(SIZE)"s", record[line][4]);
        line++;
        if ( line >= LINES) {
        break;
        }
        }
        }
        }

        fclose ( pf);

        for ( int item = 0; item < line; ++item) {
        for ( int each = 0; each < SECTIONS; ++each) {
        printf ( "record[%d][%d] %sn", item, each, record[item][each]);
        }
        printf ( "n");
        }

        return 0;
        }






        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Nov 23 '18 at 14:01

























        answered Nov 23 '18 at 11:02









        xingxing

        1,434288




        1,434288
































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