Passing by Pointer

Passing By Reference

Here, the memory location (address) of the variables is passed to the parameters in the function, and then the operations are performed. It is also called the call by pointer method.

C++

// C++ program to swap two numbers using
// pass by pointer
#include <iostream>
using namespace std;
 
void swap(int *x, int *y)
{
    int z = *x;
    *x = *y;
    *y = z;
}
 
// Driver Code
int main()
{
    int a = 45, b = 35;
    cout << "Before Swap\n";
    cout << "a = " << a << " b = " << b << "\n";
 
    swap(&a, &b);
 
    cout << "After Swap with pass by pointer\n";
    cout << "a = " << a << " b = " << b << "\n";
}

Output

Before Swap
a = 45 b = 35
After Swap with pass by pointer
a = 35 b = 45

Passing By Pointer vs Passing By Reference in C++

In C++, we can pass parameters to a function either by pointers or by reference. In both cases, we get the same result. So, what is the difference between Passing by Pointer and Passing by Reference in C++?

Let’s first understand what Passing by Pointer and Passing by Reference in C++ mean:

Tags:

#cpp-parameter-passing #cpp-references #pointer #C++ #CPP

Passing By Reference

Passing by Pointer

C++

Passing By Pointer vs Passing By Reference in C++

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