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