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conj() function in C++ with Examples

Last Updated : 14 Aug, 2024
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The conj() function is defined in the complex header file. This function is used to find the conjugate of the complex number z. If we represent a complex number z as (real, img), then its conjugate is (real, -img).
Syntax: 
 

template<class T> complex<T> 
     conj (const complex<T>& Z);


Parameter: 
 

  • z: This method takes a mandatory parameter z which represents the complex number.


Return value: This function returns the conjugate of the complex number z.

Time Complexity: O(1)

Auxiliary Space: O(1)
Below programs illustrate the conj() function for complex number in C++:
Example 1:-
 

CPP 
// C++ program to demonstrate
// example of conj() function.
 
#include <bits/stdc++.h>
using namespace std;
 
// driver program
int main ()
{
  complex<double> complexnumber (3.0, 2.4);
 
  cout << "The conjugate of " << complexnumber << " is: ";
 
  // use of conj() function
  cout << conj(complexnumber) << endl;
  return 0;
}

Output
The conjugate of (3,2.4) is: (3,-2.4)

Example 2:-

CPP 
// C++ program to demonstrate
// example of conj() function.
 
#include <bits/stdc++.h>
using namespace std;
 
// driver program
int main ()
{
  complex<double> complexnumber (2.0, 9.0);
 
  cout << "The conjugate of " << complexnumber << " is: ";
 
  // use of conj() function
  cout << conj(complexnumber) << endl;
  return 0;
}

Output
The conjugate of (2,9) is: (2,-9)

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