C语言牛客网BC-37 牛牛的圆(求面积)
题目如下
代码实现
#include<stdio.h>
int main()
{ float r = 0;float s = 0;scanf("%f",&r);s = 3.14*r*r;printf("%.2f",s);return 0;
}
#include<stdio.h>
int main()
{ float r = 0;float s = 0;scanf("%f",&r);s = 3.14*r*r;printf("%.2f",s);return 0;
}