题解 | #牛牛的圆#
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <stdio.h>
#include<math.h>
int main() {
int r = 0;
scanf("%d",&r);
float F =pow(r,2)*3.14;
printf("%.2f",F);
return 0;
}
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <stdio.h>
#include<math.h>
int main() {
int r = 0;
scanf("%d",&r);
float F =pow(r,2)*3.14;
printf("%.2f",F);
return 0;
}
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