4 Types of Function

#include <iostream>
using namespace std;

/*

//Witout return without Par
void Sum(){
//input
//proccess
/output
   int a,b,c;
   cout<<"Please Input 2 Number:\n";
   cin>>a>>b;
   c=a+b;
   cout<<"Result="<<c;
}




int main(){
   
   //=====1===
   Sum();//Call      
}

*/
//====================2================
/*
//Witout return with Par

void Sum(int a,int  b){
   //procces
   //output
   int c;
   c=a+b;
   cout<<"Result="<<c;    
}


int main(){
   
   //Input
   int a,b;
   cout<<"Please Input 2 Number:\n";
   cin>>a>>b;
   //=====2===
   Sum(a,b);//Call       
}
*/

//=============3============
//with return without par
/*

int Sum(){
   //input
   int a,b,c;
   cout<<"Please Input 2 number\n";
   cin>>a>>b;
   //proccess
   c=a+b;
   return c;
} 

int main(){
   //output
   int c;
   c=Sum();
   cout<<"Result="<<c;
}

*/

//=============4===========
//with return with par

int Sum(int a,int b){
    //Proccess
    return (a+b);
}

int main(){
    int a,b,c;
    //Input
    cout<<"Please Input 2 Number\n";
    cin>>a>>b;
    c=Sum(a,b);
    //Output
    cout<<"Result="<<c;
    return 0;
}