void exchange(int, int); int main { int a=5,b=7; exchange(a,b); } void exchange (int x, int y) { int temp; temp = x; x = y; y = temp; return; } // end exchange
#include<iostream> using namespace std; void ClearPtr(int *&p); void ClearPtr2(int *p2); int main() { int x=5, x2=6; int *pointer, *pointer2; pointer=&x; pointer2=&x2; cout << "x is: " << *pointer << endl; cout << "pointer is holding address: " << pointer << endl; cout << endl; cout << "x2 is: " << *pointer2 << endl; cout << "pointer2 is holding address: " << pointer2 << endl; cout << endl; ClearPtr(pointer); ClearPtr2(pointer2); cout <<"pointer is holding address: " << pointer << endl; cout <<"pointer2 is holding address: " << pointer2 << endl; return 0; } void ClearPtr(int *& p) { p=0; } void ClearPtr2(int *p2) { p2=0; }
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