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Presupunand ca orice post poate ajuta candva pe cineva , poftim un programel in c++ , un calculator mai exact , bazat pe functia switch si pentru afisarea pe ecran a operatiilor am folosit vectori.

#include<iostream>
#include<cstdlib>
#include<conio.h>
#include<vector>
/* Autor : BGD 1337
Progamming Language - C++
Scope : Can be useful for a begginer.
*/
using namespace std;
int main(){
int a,b;
char choise;
vector<string> operatii;
vector<string>::iterator iter;
cout <<"\t\tCalculator pe sectiuni de operatii\n\n";
operatii.push_back("Inmultire");
operatii.push_back("Adunare");
operatii.push_back("Scadere");
operatii.push_back("Impartire");
restart:
cout<<"Alege operatia dorita\n\n";
for (iter = operatii.begin(); iter != operatii.end(); iter++)
cout << *iter << endl;
int alege;
cout<<"\nAlege: ";cin>>alege;
switch(alege){
case 1: cout<<"Ai ales operatia de inmultire , acum poti calcula\n\n";
cout<<"a=";cin>>a;
cout<<"b=";cin>>b;
cout<<"Rezultatul este " <<a*b<<endl;
cout <<"\nDoresti sa iesi din program ?[Y/N]\n";
choise=_getch();
if (choise == 'n')
goto restart;
break;
case 2: cout<<"Ai ales operatia de adunare , acum poti calcula\n\n";
cout <<"a=";cin>>a;
cout <<"b=";cin>>b;
cout <<"Rezultatul este " <<a+b<<endl;
cout <<"\nDoresti sa iesi din program ?[Y/N]\n";
choise=_getch();
if (choise == 'n')
goto restart;
break;
case 3: cout<<"Ai ales operatia de scadere , acum poti calcula\n";
cout <<"a=";cin>>a;
cout <<"b=";cin>>b;
cout <<"Rezultatul este " <<a-b<<endl;
cout <<"\nDoresti sa iesi din program ?[Y/N]\n\n";
choise=_getch();
if (choise == 'n')
goto restart;
break;
case 4: cout<<"Ai ales operatia de impartire , acum poti calcula\n\n";
cout <<"a=";cin>>a;
cout <<"b=";cin>>b;
cout <<"Rezultatul este " <<a/b<<endl;
cout <<"\nDoresti sa iesi din program ?[Y/N]\n\n";
choise=_getch();
if (choise == 'n')
goto restart;
break;
default: cout<<"Nu exista aceasta operatie";
cout <<"\nDoresti sa iesi din program ?[Y/N]\n";
choise=_getch();
if (choise == 'n')
goto restart;
}
cin.ignore(cin.rdbuf()->in_avail() +1);
getchar();
return 0;
}

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Mi-a dat o eroare la getchar();. Eroare ce s-a rezolvat folosind un #include<stdio.h>. In rest e ok. Este super bun programul pentru incepatori!

Eu stiu ca getchar() se afla in libraria conio.h . In orice caz programul va functiona si fara acesta deoarece linia cin.ignore(cin.rdbuf()->in_avail() +1); are la randul ei rolul de a tine fereastra deschisa.

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