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