Tema_2(Muresan Ilinca)

#include<iostream>
#include<fstream>
#include<cmath>
using namespace std;
ifstream fin("complexe.in");
ofstream fout("complexe.out");
struct complex
{
    double real;double imaginar;
}z,z1,z2,v[100];

void citire(struct complex &z)
{
    fin>>z.real>>z.imaginar;
}
void scriere(struct complex z)
{
    if(z.imaginar>0)
    {
        fout<<z.real<<'+'<<z.imaginar<<"*i"<<endl;
    }
    if(z.imaginar<0)
    {
        fout<<z.real<<z.imaginar<<"*i"<<endl;
    }
    if(z.imaginar==0)
    {
        fout<<z.real<<endl;
    }
}
complex suma(struct complex z1,struct complex z2)
{
    complex suma_elemente;
    suma_elemente.real=z1.real+z2.real;
    suma_elemente.imaginar=z1.imaginar+z2.imaginar;
    return suma_elemente;
}
complex maxim(struct complex z1,struct complex z2)
{

    double modul1=0,modul2=0;
    modul1+=sqrt((z1.real*z1.real)+(z1.imaginar*z1.imaginar));
    modul2+=sqrt((z2.real*z2.real)+(z2.imaginar*z2.imaginar));
    if(modul1>modul2)
    {
        return z1;
    }
    else
    {
        return z2;
    }
}
int modul( struct complex z)
{
    double modul=0;
    modul+=sqrt((z.real*z.real)+(z.imaginar*z.imaginar));
    return modul;
}
int main()
{
    int n,i,j;
    complex suma_,maxim_,aux;
    fin>>n;
    suma_={0};
    maxim_={0};
    for(i=1;i<=n;i++)
    {
        citire(z);
        v[i]=z;
        scriere(v[i]);
    }
    fout<<endl;

    for(i=1;i<=n;i++)
    {
        suma_=suma(suma_,v[i]);

    }
    scriere(suma_);
    fout<<endl;

    for(i=1;i<n;i++)
    {
        maxim_=maxim(maxim_,v[i]);
    }
    scriere(maxim_);
    fout<<endl;

    for(i=1;i<=n;i++)
    {
        for(j=i+1;j<=n;j++)
        {
            if(modul(v[i])>modul(v[j]))
            {
                aux=v[i];
                v[i]=v[j];
                v[j]=aux;
            }
        }
    }
    for(i=1;i<=n;i++)
    {
        scriere(v[i]);
    }
    fin.close();
    fout.close();
    return 0;
}