Hello. I have a problem. Here is a code: #include <stdio.h> int

Question

Hello. I have a problem. Here is a code: #include <stdio.h> int

main() {
char buffer[1000];

while (fgets(buffer, sizeof(buffer), stdin) != NULL) {
printf("Line read: %s", buffer);
}

printf("\nPress Enter to exit...\n");
getchar();

return 0;
}

I want my app to read stdin, then after i finished entering data, program should print "Press enter" and wait for user input before finishing. But now it is finishing immediately

I tried to launch this way:

./a.out < test

or just

./a.out

And then after finishing input data, i press ctrl+D and its still just immediately exits without waiting for confirmation. What am i doing wrong ?

0

03.03.2024

9 ответов

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جبريل 🇸🇦 Автор вопроса

Ми🐳а ᅠ ᅠᅠ ᅠᅠ
Try printf("\nPress Enter to exit...\n"); while...

And i just got infinite loop i think

0

8 месяцев назад

Thomas

the input buffer is not empty after returning from the while, so getchar() returns immediately

0

8 месяцев назад

جبريل 🇸🇦 Автор вопроса

Thomas
the input buffer is not empty after returning from...

Oh, okay. How i can clear it after fgets then ?

0

8 месяцев назад

Thomas

جبريل 🇸🇦
Oh, okay. How i can clear it after fgets then ?

you can read from it until it blocks

0

8 месяцев назад

Alviro Iskandar Setiawan

Стикер

0

8 месяцев назад

Alviro Iskandar Setiawan

Стикер

0

8 месяцев назад

جبريل 🇸🇦 Автор вопроса

Hm. Interesting. Thanks for info

0

8 месяцев назад

Alviro Iskandar Setiawan

جبريل 🇸🇦
Hm. Interesting. Thanks for info

I believe this is what you need: https://www.gnu.org/software/libc/manual/html_node/Noncanon-Example.html This is an example to handle CTRL + D so that the read() syscall is aware of that. The CTRL + D will yield an EOT char '\004'. Nore that this only works when the stdin is a terminal. Doing ./bla < file doesn't work in this approach.

0

8 месяцев назад

Ми🐳а ᅠ ᅠᅠ ᅠᅠ · Accepted Answer

Ми🐳а ᅠ ᅠᅠ ᅠᅠ

Try printf("\nPress Enter to exit...\n"); while (getchar() != '\n');

0

8 месяцев назад

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