main(){
    float n1, n2;
    char oper;
    cout<<"Introduce n1: ";
    cin>>n1;
    cout<<"Introducce n2: ";
    cin>>n2;
    cout<<"Para sumar: '+',restar: '-',dividir: '/', multiplicar: '*' : ";
    cin>>oper;
    switch(oper){
        case '+': cout<<n1+n2; break;
        case '-': cout<<n1-n2; break;
        case '/': cout<<n1/n2; break;
        case '*': cout<<n1*n2; break;
        default: cout<<"No as introducido un operador correcto...";
    }
return  0;
}