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