Breaking News: Grepper is joining You.com. Read the official announcement!

c++ call by value vs call by reference

S.Y answered on June 22, 2022 Popularity 9/10 Helpfulness 4/10

answer c++ call by value vs call by reference

c++ call by value vs call by reference

Comment

//calling by value
//the increment function and the main function has two different variables in two
//different addresses in the memory

//In other words, we pass the value of the variable to the function
#include <iostream>
using namespace std;
void increment(int n){
    n++;
   cout<<"In function: "<<n<<endl; 
}

int main()
{
   int x=5;
   increment(x);
   cout<<"In main: "<<x<<endl;	//No change occurs to the variable in the main
   
}

//calling by refrence
//the increment function points to the address of the variable in the main function
//In other words, we pass the variable itself to the function

#include <iostream>
using namespace std;
void increment(int &n){
    n++;
   cout<<"In function: "<<n<<endl; 
}

int main()
{
   int x=5;
   increment(x);
   cout<<"In main: "<<x<<endl;
   
}

Popularity 9/10 Helpfulness 4/10 Language cpp

Source: Grepper

Tags: c++ call call-by-value reference

Link to this answer
Share Copy Link

Contributed on Jun 22 2022

S.Y

0 Answers Avg Quality 2/10

c++ call by value vs call by reference

Contents

More Related Answers

c++ call by value vs call by reference

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.