C++ Function example

#include <iostream>

using namespace std;

int getTotal(int, int);

main()
{
int num1,num2,total;
cout << "Enter first number :";
cin >> num1;
cout << "Enter second number :";
cin >> num2;
total=getTotal(num1,num2);

return 0;
}

int getTotal(int a, int b)
{
int result;
result=a+b;
return result;
}

Notes :
int getTotal() means that this functions returns an integer type variable.
In Linux, compile using this command
g++ yourfile.cpp -o yourfile.exe