Sometimes come across a situation where you need to swap two variables. Below is the code that will let you swap two pointers. Say that p and q point to x and y respectively. After swapping them, p and q would point to variables y and x respectively. However, the address of x and y will remain unchanged.
void swap(int **p1, int **p2){ int *temp; temp = *p1; *p1 = *p2; *p2 = temp;}//Calling syntax is swap(&p,&q);
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