int **ptr

What is int **ptr? and how can we use it?

Thanks for reply, but for example here:

Code:

---

void printStr(char **str1)
{
    printf("String2 is %s\n", *str1);
    return;
}

---

Why did you use char **str1, why didn't we just use char *str1?

>>Why did you use char **str1, why didn't we just use char *str1?
No reason to do so, *str1 would have done the job.

int **ptr points to a pointer variable, i.e; it contains the address of a pointer variable of type integer.

#include <iostream.h>

int add( int **, int **);

int main (void)
{
int x = 4;
int y = 9;

int *ptrx = &x;
int *ptry = &y;

int result = 0;
result = add(&ptrx, &ptry);

cout << result << endl;

return 0;

}


int add( int **ptr_ptrx, int **ptr_ptry)
{

//cout << **ptr_ptrx << endl;
//cout << **ptr_ptry << endl;
return ( **ptr_ptrx + **ptr_ptry);
}

Thanks alot, Salem, Hammer, and nasir...
Now I know how to use it, and Hammer your reply helped alot, I was confused, that we used int **ptr, and now I get it.

@nasir_sidd: code tags please :)