题解 | #单组_spj判断浮点误差#
单组_spj判断浮点误差
https://www.nowcoder.com/practice/6652094c6a0e4381911b541ed664d8b7
#include<bits/stdc++.h>
using namespace std;
int main() {
int r;
cin >> r;
printf("%lf",M_PI *pow(r, 2)) ;// 用c++自带的pi
}
单组_spj判断浮点误差
https://www.nowcoder.com/practice/6652094c6a0e4381911b541ed664d8b7
#include<bits/stdc++.h>
using namespace std;
int main() {
int r;
cin >> r;
printf("%lf",M_PI *pow(r, 2)) ;// 用c++自带的pi
}
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