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