Why this program never printing '0'?

Question

#include<stdio.h>

int main(int argc, char *argv[]) {
    int c;

    while ((c = getchar()) != EOF) {
        printf("%d ", c != EOF);
        putchar(c);
    }

    printf("\n%d\n", c != EOF);

}

Answer 1

This will print 0 only if ,

If you are running on Windows , hit "Cntrl+Z"

If you are on Linux, hit "Cntrl+D"

You dont want the code to execute the while () loop.So you have enter the EOF character in input.