[C++]Transf Timp

//********************** Transformare timp **************************\\
#include<iostream.h>

//using namespace std;
int nr;
void citire()
{
    cout<<"1. ore <-> minute"<<endl<<"2. ore <-> secunde"<<endl;
    cout<<"3. minute <-> ore"<<endl<<"4. minute <-> secunde"<<endl;
    cout<<"4. secunde <-> ore"<<endl<<"5. secunde <-> minute"<<endl<<endl;
    cout<<"Ce doriti sa transformati?"<<endl;cin>>nr;
}
void ore_min()//1
{
    int ore,min;
    cout<<"Introduceti numarul de ore apoi apasati ENTER"<<endl;
    cout<<"* Ore:";cin>>ore;
    min=ore*60;
    cout<<"In "<<ore<<" ore sunt "<<min<<" minute."<<endl;
}
void ore_sec()//2
{
    int ore,sec;
    cout<<"Introduceti numarul de ore apoi apasati ENTER"<<endl;
    cout<<"* Ore: ";cin>>ore;
    sec=ore*(60*60);
    cout<<"In "<<ore<<" ore sunt "<<sec<<" secunde."<<endl;
}
void min_ore()//3
{
    int min, ore;
    cout<<"Introduceti numarul de minute apoi apasati ENTER"<<endl;
    cout<<"* Minute: "; cin>>min;
    ore=min/60;
    cout<<"In "<<min<<" minute sunt "<<ore<<" ore."<<endl;
}
void min_sec()//4
{
    int min, sec;
    cout<<"Introduceti numarul de minute apoi apasati ENTER"<<endl;
    cout<<"* Minute: "; cin>>min;
    sec=min*60;
    cout<<"In "<<min<<" minute sunt "<<sec<<" secunde."<<endl;
}
void sec_ore()//5
{
    int sec, ore;
    cout<<"Introduceti numarul de secunde apoi apasati ENTER"<<endl;
    cout<<"* Secunde: "; cin>>ore;
    ore=sec/(60*60);
    cout<<"In "<<sec<<" secunde sunt "<<ore<<" ore."<<endl;
}
void sec_min()//6
{
    int sec, min;
    cout<<"Introduceti numarul de secunde apoi apasati ENTER"<<endl;
    cout<<"* Secunde: "; cin>>min;
    min=sec/60;
    cout<<"In "<<sec<<" secunde sunt "<<min<<" minute."<<endl;
}
void transformare()
{
    if(nr==1)
        ore_min();
    else if(nr==2)
        ore_sec();
    else if(nr==3)
        min_ore();
    else if(nr==4)
        min_sec();
    else if(nr==5)
        sec_ore();
    else if(nr==6)
        sec_min();
    else
    {
        cout<<"Ai tastat un numar gresit!"<<endl;
        citire();
    }
}

int main()
{
    citire();
    transformare();
    return 0;
}