tut15.cpp

// Functions & Function Prototypes in C++

#include<iostream>
using namespace std;

// function prototyping
// type function-name (arguments); 
// int sum(int a, int b); //----> Acceptable
// int sum(int a,b); //---->Not Acceptable
int sum(int , int ); //---->Acceptable
// void g(void); //---->Acceptable
void g(); // ----> Acceptable

int main(){
    int num1,num2;
    cout<<"Enter first number"<<endl;
    cin>>num1;
    cout<<"Enter second number"<<endl;
    cin>>num2;
    // num1 and num2 are actual parameters
    cout<<"The sum is "<<sum(num1,num2);
    g();
    return 0;
}


int sum(int a , int b){
    /* Formal parameters a and b will be taking values from actual 
    parameters num1 and num2 .*/
    int c = a+b;
    return c;
}

void g(){
    cout<<"\nHello , Good Morning . ";
}