答案
2024-07-18 17:27:40
发布于：北京
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#include <bits/stdc++.h>
using namespace std;
int main(){
double p = 3.14159, r, a, b, c;
cin >> r;
a = r * 2;
b = r * 2 * p;
c = r * r * p;
printf("%.4f", a);
cout << " ";
printf("%.4f", b);
cout << " ";
printf("%.4f", c);
return 0;
}
全部评论 5
#include <bits/stdc++.h> using namespace std; int main(){ double p = 3.14159, r, a, b, c; cin >> r; a = r * 2; b = r * 2 * p; c = r * r * p; printf("%.4f", a); cout << " "; printf("%.4f", b); cout << " "; printf("%.4f", c); return 0; }2024-07-18 来自 北京
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