gcc - Why does an infinite loop block a printf statement earlier in my C program? -

this question has answer here:

this c program prints done, enters infinite loop.

#include <stdio.h>  int main(int argc, char const *argv[]) {     printf("done");     while (1) {}     return 0; }

but when run it, code not print done. why that?

it needs flush buffer. console output doesn't flush until receives '\n'.

there's little-used function this, fflush().

#include <stdio.h>  int main(int argc, char const *argv[]) {     printf("done");     fflush(stdout);     while (1) {}     return 0; }

that should print you.

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