#include<iostream>
#include <iomanip>
using namespace std;
void circular(double);
int main()
{
double r;
while (cin >> r)
{ circular(r);
}
}
void circular(double r)
{
const double PI = 3.1415927;
double v = (4*PI*r*r*r)/3;
cout << fixed << setprecision(3) << v << endl;
}
第七题
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转载自blog.csdn.net/weixin_43967023/article/details/84880161
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