c语言 球的体积如何编程？

#include <stdio.h>
#define PI 3.14
int main()
{
float r,v;
printf("input r:");
scanf("%f",&r);
getchar();
v=(4/3)*PI*(r^3)
printf("the volume is %f",v);
return 0;
}

和楼上的好像差不多.

#include<iostream>
using namespace std;
//=========================
void main(void){
const PI=3.14;
double r=0;
cout<<"请输入球体的半径";
cin>>r;
double v=0;
v=4/3*PI*r^3;
cout<<"这个球体的体积:"<<v;
}
//-------------------------

#include <stdio.h>
#define PI 3.14
main(){
double r,v;
printf("Please input r");
scanf("%f",&r);
v=(4/3)*PI*(r^3);
printf("%f",v);}