bogus.c

#include <stdio.h>
#include <math.h>

double Distance(double x, double y)
{
    /* Intentional bug for illustration... */
    return sqrt(-1.0);
}

int main()
{
    double r = Distance(3.0, 4.0);
    double diff = fabs(r - 5.0);
    printf("diff = %lf\n", diff);
    if (diff > 1.0e-12)
    {
        printf("FAIL\n");
        return 1;
    }
    printf("PASS\n");
    return 0;
}