C++ Program to Swap Numbers in Cyclic Order Using Call by Reference
In this example, we will learn to Swap Numbers in Cyclic Order Using Call by Reference.
To understand this example, you should have the knowledge of the following C++ programming topics:
Introduction
Three variables entered by the user are stored in variables a, b and c respectively.
Then, these variables are passed to the function cyclicSwap()
. Instead of passing the actual variables, addresses of these variables are passed.
When these variables are swapped in cyclic order in the cyclicSwap()
function, variables a, b and c in the main
function are also automatically swapped.
Example: Program to Swap Elements Using Call by Reference
#include<iostream>
using namespace std;
void cyclicSwap(int *a, int *b, int *c);
int main()
{
int a, b, c;
cout << "Enter value of a, b and c respectively: ";
cin >> a >> b >> c;
cout << "Value before swapping: " << endl;
cout << "a, b and c respectively are: " << a << ", " << b << ", " << c << endl;
cyclicSwap(&a, &b, &c);
cout << "Value after swapping numbers in cycle: " << endl;
cout << "a, b and c respectively are: " << a << ", " << b << ", " << c << endl;
return 0;
}
void cyclicSwap(int *a, int *b, int *c)
{
int temp;
temp = *b;
*b = *a;
*a = *c;
*c = temp;
}
Output
Enter value of a, b and c respectively: 1 2 3 Value before swapping: a=1 b=2 c=3 Value after swapping numbers in cycle: a=3 b=1 c=2
Notice that we haven't returned any values from the cyclicSwap()
function.
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We hope that this Example helped you develop better understanding of the concept of "Swap Numbers in Cyclic Order (Call by Reference)" in C++.
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.