C - fprintf returning Access violation writing location 0x00246D1C
So my fprintf and also my fputs aren't successfully writing in the file that I want. Here is the relevant code, thank you.
void print_stats(double max, double min, double avg, double sum)
{
FILE *paid = ("paid.txt", "w");
//paid = ("paid.txt", "w");
if (paid == NULL)
printf("Failed");
fputs("Test", paid);
fprintf(paid, "Max: %.2fnMin: %.2fnAverage: %.2fnTotal: %.2f",
max, min, avg, sum);
fclose(paid);
}
c
add a comment |
So my fprintf and also my fputs aren't successfully writing in the file that I want. Here is the relevant code, thank you.
void print_stats(double max, double min, double avg, double sum)
{
FILE *paid = ("paid.txt", "w");
//paid = ("paid.txt", "w");
if (paid == NULL)
printf("Failed");
fputs("Test", paid);
fprintf(paid, "Max: %.2fnMin: %.2fnAverage: %.2fnTotal: %.2f",
max, min, avg, sum);
fclose(paid);
}
c
2
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11
add a comment |
So my fprintf and also my fputs aren't successfully writing in the file that I want. Here is the relevant code, thank you.
void print_stats(double max, double min, double avg, double sum)
{
FILE *paid = ("paid.txt", "w");
//paid = ("paid.txt", "w");
if (paid == NULL)
printf("Failed");
fputs("Test", paid);
fprintf(paid, "Max: %.2fnMin: %.2fnAverage: %.2fnTotal: %.2f",
max, min, avg, sum);
fclose(paid);
}
c
So my fprintf and also my fputs aren't successfully writing in the file that I want. Here is the relevant code, thank you.
void print_stats(double max, double min, double avg, double sum)
{
FILE *paid = ("paid.txt", "w");
//paid = ("paid.txt", "w");
if (paid == NULL)
printf("Failed");
fputs("Test", paid);
fprintf(paid, "Max: %.2fnMin: %.2fnAverage: %.2fnTotal: %.2f",
max, min, avg, sum);
fclose(paid);
}
c
c
edited Nov 13 '18 at 7:28
Lennart
6,000125065
6,000125065
asked Nov 13 '18 at 3:08
Ryan MRyan M
102
102
2
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11
add a comment |
2
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11
2
2
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11
add a comment |
1 Answer
1
active
oldest
votes
You never actually opened the file:
FILE *paid = ("paid.txt", "w");
This evaluates ("paid.txt", "w")
as an expression, with the comma operator discarding the left operand "paid.txt" and evaluating the right operand "w", and then assigning that to paid
.
You need to call fopen
here:
FILE *paid = fopen("paid.txt", "w");
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
@RyanM in your original code you also should consider what happens iffopen
returns NULL because the file cannot be opened. It is not going to end well..
– Jabberwocky
Nov 13 '18 at 7:39
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53273197%2fc-fprintf-returning-access-violation-writing-location-0x00246d1c%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You never actually opened the file:
FILE *paid = ("paid.txt", "w");
This evaluates ("paid.txt", "w")
as an expression, with the comma operator discarding the left operand "paid.txt" and evaluating the right operand "w", and then assigning that to paid
.
You need to call fopen
here:
FILE *paid = fopen("paid.txt", "w");
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
@RyanM in your original code you also should consider what happens iffopen
returns NULL because the file cannot be opened. It is not going to end well..
– Jabberwocky
Nov 13 '18 at 7:39
add a comment |
You never actually opened the file:
FILE *paid = ("paid.txt", "w");
This evaluates ("paid.txt", "w")
as an expression, with the comma operator discarding the left operand "paid.txt" and evaluating the right operand "w", and then assigning that to paid
.
You need to call fopen
here:
FILE *paid = fopen("paid.txt", "w");
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
@RyanM in your original code you also should consider what happens iffopen
returns NULL because the file cannot be opened. It is not going to end well..
– Jabberwocky
Nov 13 '18 at 7:39
add a comment |
You never actually opened the file:
FILE *paid = ("paid.txt", "w");
This evaluates ("paid.txt", "w")
as an expression, with the comma operator discarding the left operand "paid.txt" and evaluating the right operand "w", and then assigning that to paid
.
You need to call fopen
here:
FILE *paid = fopen("paid.txt", "w");
You never actually opened the file:
FILE *paid = ("paid.txt", "w");
This evaluates ("paid.txt", "w")
as an expression, with the comma operator discarding the left operand "paid.txt" and evaluating the right operand "w", and then assigning that to paid
.
You need to call fopen
here:
FILE *paid = fopen("paid.txt", "w");
answered Nov 13 '18 at 3:11
dbushdbush
93.7k12101134
93.7k12101134
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
@RyanM in your original code you also should consider what happens iffopen
returns NULL because the file cannot be opened. It is not going to end well..
– Jabberwocky
Nov 13 '18 at 7:39
add a comment |
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
@RyanM in your original code you also should consider what happens iffopen
returns NULL because the file cannot be opened. It is not going to end well..
– Jabberwocky
Nov 13 '18 at 7:39
man youre quick
– Bwebb
Nov 13 '18 at 3:12
man youre quick
– Bwebb
Nov 13 '18 at 3:12
2
2
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
@RyanM Glad I could help. Feel free to accept this answer if you found it useful.
– dbush
Nov 13 '18 at 3:35
1
1
@RyanM in your original code you also should consider what happens if
fopen
returns NULL because the file cannot be opened. It is not going to end well..– Jabberwocky
Nov 13 '18 at 7:39
@RyanM in your original code you also should consider what happens if
fopen
returns NULL because the file cannot be opened. It is not going to end well..– Jabberwocky
Nov 13 '18 at 7:39
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53273197%2fc-fprintf-returning-access-violation-writing-location-0x00246d1c%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
2
You are not implementing your NULL pointer check correctly. You are trying to write a string in read only data segment if i had to guess. you need to call fopen() instead of just () like your doing here.
– Bwebb
Nov 13 '18 at 3:11