Pointers to pointers in c programming language

C pointers to pointers: A pointer is pointing to another pointers is called pointers to pointer.

Examples of pointers to pointers in c:

What will be output if you will execute following code?


int main(){

int s=2,*r=&s,**q=&r,***p=&q;

return 0;


Output: 2


As we know p[i] =*(p+i)



Another rule is: *&i=i


***p=*** (&q) =**q=** (&r) =*r=*(&s) =s=2


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