Use reference parameters to create the swap() function. : reference parameter « Function « C++ Tutorial

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C++ Tutorial » Function » reference parameter

7. 4. 2. Use reference parameters to create the swap() function.


#include <iostream> 

using namespace std; 

 

void swap(int &x, int &y); 

 

int main() 

{ 

  int i, j; 

 

  i = 10; 

  j = 20; 

 

  cout << "Initial values of i and j: "; 

  cout << i << ' ' << j << '\n'; 

 

  swap(j, i); 

 

  cout << "Swapped values of i and j: "; 

  cout << i << ' ' << j << '\n'; 

 

  return 0; 

} 

 

void swap(int &x, int &y) 

{ 

  int temp; 

 

  temp = x;  

  x = y;     

  y = temp;  

}

Initial values of i and j: 10 20
Swapped values of i and j: 20 10

7. 4. reference parameter
	7. 4. 1.	Using a reference parameter.
	7. 4. 2.	Use reference parameters to create the swap() function.
	7. 4. 3.	Pass by reference by using pointer
	7. 4. 4.	Pass by reference using references
	7. 4. 5.	Returning multiple values from a function using references
	7. 4. 6.	Passing references to objects

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