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C++ Complex::conj() function

The C++ std::complex::conj() function is used to return the complex conjugate of a given complex number. The complex number consists of real and imaginary part, and its conjugate is obtained by chnging the sign of the imaginary part. For example, the conjugate of the complex number x+yi, is x-yi.

Following is the syntax for std::complex::conj() function.

conj (const complex<T>& x);	
complex<double> conj (ArithmeticType x);

• x − It indicates the complex value.

It returns the conjugate of the complex number x.

none

In the following example, we are going to consider the basic usage of the conj() function.

#include <iostream>
#include <complex>
int main() {
   std::complex < double > x(1.1, 1.3);
   std::complex < double > x1 = std::conj(x);
   std::cout << "Original: " << x << std::endl;
   std::cout << "Conj: " << x1 << std::endl;
   return 0;
}

Output of the above code is as follows −

Original: (1.1,1.3)
Conj: (1.1,-1.3)

Consider the following example, where we are going to use the conj() with the zero imaginary part.

#include <iostream>
#include <complex>
int main() {
   std::complex < double > x(1.2, 0.0);
   std::complex < double > x1 = std::conj(x);
   std::cout << "Original: " << x << std::endl;
   std::cout << "Conj: " << x1 << std::endl;
   return 0;
}

Following is the output of the above code −

Original: (1.2,0)
Conj: (1.2,-0)

Let's look at the following example, where we are going to use the conj() with the negative values.

#include <iostream>
#include <complex>
int main() {
   std::complex < double > x(-1.2, -2.2);
   std::complex < double > x1 = std::conj(x);
   std::cout << "Original: " << x << std::endl;
   std::cout << "Conj: " << x1 << std::endl;
   return 0;
}

If we run the above code it will generate the following output −

Original: (-1.2,-2.2)
Conj: (-1.2,2.2)

complex.htm

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