Make swap() change the actual values using pointers - C++ Data Type

C++ examples for Data Type:Pointer

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Description

Make swap() change the actual values using pointers

Demo Code

#include <iostream> 
   //ww  w  . j  a  v  a 2 s. com
void swap(int *x, int *y); 
 
int main() 
{ 
    int x = 5, y = 10; 
   
    std::cout << "Main. Before swap, x: " << x  
                  << " y: " << y << std::endl; 
    swap(&x, &y); 
    std::cout << "Main. After swap, x: " << x  
                  << " y: " << y << std::endl; 
    return 0; 
} 
   
void swap(int *px, int *py) 
{ 
    int temp; 
   
    std::cout << "Swap. Before swap, *px: " << *px  
                  << " *py: " << *py << std::endl; 
   
    temp = *px; 
    *px = *py; 
    *py = temp; 
   
    std::cout << "Swap. After swap, *px: " << *px  
                  << " *py: " << *py << std::endl; 
}

Result


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