c++求圆的圆心和面积
时间: 2023-09-13 15:13:17 浏览: 123
在C++中,可以使用以下代码来计算圆的周长和面积:
```cpp
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
const double PI = 3.1415;
int main() {
double r, girth, area;
cout << "Please input radius:\n";
cin >> r;
girth = 2 * PI * r;
area = PI * pow(r, 2);
cout << "radius = " << r << endl;
cout << "girth = " << girth << endl;
cout << "area = " << area << endl;
return 0;
}
```
这段代码会要求用户输入圆的半径,然后计算出圆的周长和面积,并将结果输出。其中,`PI`是一个常量,表示圆周率。\[1\]
另外,如果对精度要求较高,可以使用更精确的圆周率值。比如,可以使用`PI = atan(1.0) * 4`来计算圆周率。\[3\]
希望这个回答能够帮到你!
#### 引用[.reference_title]
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