2002

计算球体体积

#include <stdio.h>
#define PI 3.14
int main()
{
    double r,v;
    while(scanf("%lf",&r))
    {
        v = (3.0/4)*PI*r*r*r;
        //除法最好留在最后算
        printf(".3%lf
",v);
    }
    return 0;
}

参考c++

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

#define PI 3.1415927

int main(void)
{
    double r;

    while (scanf("%lf", &r) != EOF)
        printf("%.3lf
", 4.0*PI*r*r*r/3.0);

    return 0;
}