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