Uso Code:Blocks!
#include <iostream>
using namespace std;
int main()
{
// var
int v,n1,n2,r,i;
cout>>(" 1.....soma"<<endl;
cout>>(" 2.....subtração"<<endl;
cout>>(" 3.....multiplica "<<endl;
cout>>(" 4.....divide"<<endl;
cout>>(" 5.....sair"<<endl;
cout>>(" digite o valor desejado"<<endl;
cin>>(v);
i = 1;.
.
.
.
.
.
.
o codigo continua.....