std::
polar
函数模板 <complex>
template<class T> complex<T> polar (const T& rho, const T& theta = 0); |
从相角和幅值生成复数
返回一个复数对象(以笛卡尔格式)，即由幅值rho和相位角theta定义的复数，其中rho是绝对大小，theta是相位角。 返回值中的值等同于:
real = rho * cos(theta); imag = rho * sin(theta); |
☲ 参数
- rho
- 复数的幅值。
- theta
- 复数的相位角。
☉ 返回值
复数笛卡尔坐标。
☣ 示例
// polar example
#include <iostream> // std::cout
#include <complex> // std::complex, std::polar
int main ()
{
std::cout << "The complex whose magnitude is " << 2.0;
std::cout << " and phase angle is " << 0.5;
std::cout << " is " << std::polar (2.0, 0.5) << '\n';
return 0;
}
|
输出:
The complex whose magnitude is 2 and phase angle is 0.5 is (1.75517,0.958851)
The complex whose magnitude is 2 and phase angle is 0.5 is (1.75517,0.958851)
🍄 另请参阅
| abs | 复数的绝对值(函数模板) |
| arg | 复数的相位角(函数模板) |