Write program to create function swap() that uses references instead of pointers.
// swap.cpp // Definition and call of the function swap(). // 1. version: parameters with pointer type, // 2. version: parameters with reference type. #include <iostream> using namespace std; void swap( float*, float*); // Prototypes of swap() void swap( float&, float&); int main() // w ww. ja v a 2s .c o m { float x = 11.1F; float y = 22.2F; cout << "x and y before swapping: " << x << " " << y << endl; swap( &x, &y); // Call pointer version. cout << "x and y after 1. swapping: " << x << " " << y << endl; swap( x, y); // Call reference version. cout << "x and y after 2. swapping: " << x << " " << y << endl; return 0; } void swap(float *p1, float *p2) // Pointer version { float temp; // Temporary variable temp = *p1; // Above call points p1 *p1 = *p2; // to x and p2 to y. *p2 = temp; } void swap(float& a, float& b) // Reference version { float temp; // Temporary variable temp = a; // For above call a = b; // a equals x and b equals y b = temp; }