题解 | #牛牛的圆#
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <bits/stdc++.h> using namespace std; int main() { int r; float s; scanf("%d",&r); s=3.14*r*r; printf("%.2f",s); return 0; }
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <bits/stdc++.h> using namespace std; int main() { int r; float s; scanf("%d",&r); s=3.14*r*r; printf("%.2f",s); return 0; }
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