C++ examples for Data Type:Pointer
Swap parameter using pointer
#include <iostream> using namespace std; void swap(double *, double *); // function prototype int main()/*from w w w . j a va 2 s. c o m*/ { double firstnum = 20.5, secnum = 6.25; cout << "The value stored in firstnum is: " << firstnum << endl; cout << "The value stored in secnum is: " << secnum << "\n\n"; swap(&firstnum, &secnum); // call swap cout << "The value stored in firstnum is now: " << firstnum << endl; cout << "The value stored in secnum is now: " << secnum << endl; return 0; } // This function swaps the values in its two arguments void swap(double *nm1Addr, double *nm2Addr) { double temp; temp = *nm1Addr; // save firstnum's value *nm1Addr = *nm2Addr; // move secnum's value into firstnum *nm2Addr = temp; // change secnum's value return; }