Răspuns :

#include <iostream>

#include <fstream>

#include <math.h>

using namespace std;

struct complex

{

float a,b;

float modul()

{

 return sqrt(pow(a,2)+pow(b,2));

}

};

void main()

{

complex z;

cout<<"Introduceti nr complex: \n";

cout<<"\tPartea reala: ";

cin>>z.a;

cout<<"\tPartea imaginara: ";

cin>>z.b;

cout<<"\nNumarul complex este: ("<<z.a<<","<<z.b<<")";

cout<<"\nModulul este: "<<z.modul()<<endl;

int g;

cin >>g;

}