C code:

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

void main() {
        int a, b, c;
        for(a=1; a < 1000; a++) {
                for(b=a+1; b < 999-a; b++) {
                        c = 1000 - (b + a);
                        if ((a*a + b*b) == c*c) {
                                printf("Found a = %d, b = %d, c = %d\n", a, b, c);
                                exit(0);
                        }
                }
        }
}