#include<bits/stdc++.h>

using namespace std;

int main(){

double v, r;

double pi = 3.14;

cin>>r;

v=pi*r*r*r*4.0/3.0;

printf("%.2f",v);

return 0;

}

答案来啦 #include<bits/stdc++.h> using namespace std; int main(){ double v, r; double pi = 3.14; cin>>r; v=pirrr4.0/3.0; printf("%.2f",v); return 0; }

我不到啊！！！~^^~