while(my $line = <>) {
   do_something($line);
}

##</code><code>##

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

int get_val(void);

int main(void) {
    int i, x, y;
    i = x = y = 0;
    while (x = get_val()) {
        i++;
        printf("in loop\n");
        if(i == 1) {
            exit(1);
        }
    }
    return i;
}

int get_val(void) {
    return(1);
}

##</code><code>##

warning.c: In function 'main':
warning.c:11: warning: suggest parentheses around assignment used as truth value