How to use complex in c++

The complex class in C is used to handle complex complex numbers, including real and imaginary parts. To create a complex object, use the complex c(real_part, imaginary_part) syntax, where real_part and imaginary_part are the real and imaginary parts of the complex number. The real and imaginary parts are accessible through the real() and imag() member variables. The complex class supports basic arithmetic operations such as addition, subtraction, multiplication, and division, as well as trigonometric functions such as sin(), cos(), and tan(). In addition, it also provides other methods such as abs() which returns the module

Usage of complex class in C

The complex class is a complex number type provided in the C standard library. It allows developers to manipulate complex numbers, which consist of real and imaginary parts.

Create complex object

To create a complex object, you can use the following syntax:

<code class="cpp">complex<T> c(real_part, imaginary_part);</code>

Where, T is the complex object The type of the real and imaginary parts (usually float or double). real_part and imaginary_part are the real and imaginary parts of the complex object.

Accessing the real and imaginary parts

You can access the real and imaginary parts of the complex object through the following member variables:

• real(): Returns the real part of the complex object
• imag(): Returns the imaginary part of the complex object

Arithmetic operations

The complex class supports basic arithmetic operations, including addition, subtraction, multiplication and division:

• : Addition of complex numbers
• -: Complex subtraction
• *: Complex multiplication
• /: Complex division

Triangle Function

complex class also provides some trigonometric functions, such as:

• sin(): Sine function
• cos(): Cosine function
• tan(): Tangent function

Other methods

## The #complex class also provides other useful methods, such as:

• abs(): Returns the modulus of the complex number
• arg(): Returns the argument of a complex number
• conj(): Returns the complex conjugate of a complex number

Example

The following code demonstrates the usage of the complex class:

<code class="cpp">#include <complex>

int main() {
  // 创建一个复数
  complex<double> c(3.5, 2.0);

  // 访问实部和虚部
  cout << "实部：" << c.real() << endl;
  cout << "虚部：" << c.imag() << endl;

  // 加减乘除
  complex<double> d(1.5, -3.0);
  cout << "c + d = " << (c + d) << endl;
  cout << "c - d = " << (c - d) << endl;
  cout << "c * d = " << (c * d) << endl;
  cout << "c / d = " << (c / d) << endl;

  // 三角函数
  cout << "sin(c) = " << sin(c) << endl;
  cout << "cos(c) = " << cos(c) << endl;
  cout << "tan(c) = " << tan(c) << endl;

  return 0;
}</code>

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