Simple Calculator using functions in C++

#include <iostream>
using namespace std;
void sum(int x , int y)
{
    cout<<"The result = "<<x+y;
}
void sub(int x , int y)
{
    cout<<"The result = "<<x-y;
}
void multi(int x , int y)
{
    cout<<"The result = "<<x*y;
}
void divi(int x , int y)
{
    cout<<"The result = "<<x/y;
}
int main()
{
    int x,y;
    char op;
    cout<<"Enter the first number"<<endl;
    cin>>x;
    cout<<"Enter the second number"<<endl;
    cin>>y;
    cout<<"Enter the operator + - * /"<<endl;
    cin>>op;
    switch(op)
    {
        case '+':
            sum(x,y);
            break;
        case '-':
            sub(x,y);
            break;
        case '*':
            multi(x,y);
            break;
        case '/':
            divi(x,y);
    }
}