题解 | #牛牛的圆#
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <stdio.h> int main() { double a,sum; scanf("%lf",&a); sum = 3.14*(a*a); printf("%.2lf",sum); }
牛牛的圆
https://www.nowcoder.com/practice/75a202e826d048a39824ec694b5ce7e3
#include <stdio.h> int main() { double a,sum; scanf("%lf",&a); sum = 3.14*(a*a); printf("%.2lf",sum); }
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