第二部分（二）：计算球体积

2021/11/26

#include<stdio.h>
#include<math.h>
#define pi 3.14
main()
{
	float r, v;
	printf("please input the radius of the sphere,system will return its volume:\n");
	scanf_s("%f", &r);
	v = 4.0 / 3 * pi * pow(r, 3);
	printf("%.3f\n", v);
}