// This shows that, for floating-point numbers,
// a+b+c is not necessarily the same as a+c+b.

#include <stdio.h>

int main() {
    float f;
    f = 1.0e9;			// 1,000,000,000
    f += 6.0;			// 1,000,000,006
    f -= 1.0e9;			// 6
    printf("f=%f\n", f);

    f = 1.0e9;			// 1,000,000,000
    f -= 1.0e9;			// 0
    f += 6.0;			// 6
    printf("f=%f\n", f);

    return 0;
}