The arg() function for complex numbers is defined in the complex header file. This function is used to return the argument of the complex number z.
Syntax:
template<class T> T arg (const complex<T>& z);
Parameter:
- z: It represents the given complex number.
Return Type: It returns the argument of the complex number. Below are programs that illustrate the above function:
Example 1:
// C++ program to demonstrate
// example of arg() function.
#include& lt; bits / stdc++.h & gt;
using namespace std;
int main()
{
// defines the complex number: (5.0 + 12.0i)
complex& lt;
double& gt;
complexnumber(5.0, 12.0);
// prints the argument of the complex number
cout& lt;
<
"
The argument of& quot;
<
<
complexnumber& lt;
<
"
is:
"
;
cout& lt;
<
arg(complexnumber) & lt;
<
endl;
return 0;
}
Output:
The argument of (5,12) is: 1.17601
Time Complexity: O(1)
Auxiliary Space: O(1)
Example 2:
// C++ program to demonstrate
// example of arg() function
#include& lt; bits / stdc++.h & gt;
using namespace std;
int main()
{
// defines the complex number: (4.0+3.0i)
complex& lt;
double& gt;
complexnumber(4.0, 3.0);
// prints the argument of the complex number
cout& lt;
<
"
The argument of& quot;
<
<
complexnumber& lt;
<
"
is:
"
;
cout& lt;
<
arg(complexnumber) & lt;
<
endl;
return 0;
}
Output:
The argument of (4,3) is: 0.643501
Time Complexity: O(1)
Auxiliary Space: O(1)
