Implementation code for struct assignment in complex multiplication

Without further ado, go straight to the code

#include <iostream>
using namespace std;
typedef struct
{
 double real;
 double imag;
} complex;

//Complex multiplication
complex X_complex(complex a, complex b)
{
 complex temp;
 temp.real = a.real * b.real - a.imag * b.imag;
 temp.imag = b.imag * a.real + a.imag * b.real;
 return temp;
}
int main(int argc, char *argv[])
{
 complex a,b,c;
 a.real = 2;
 a.imag = 3;
 b.real = 4;
 b.imag = 5;
 c = X_complex(a,b);//A structure can be used as a return value and then assigned to another variable of the same structure
 cout<<c.real<<","<<c.imag<<endl;
 return 0;
}