Web Reference: According to the first answer to this question, if foo were to modify the size of the array, a double pointer would be required. One can clearly see how a triple pointer (and beyond, really) would be required. In my case if I were passing an array of pointers (or array of arrays), I would use it. This program demonstrates how to declare and initialize a single pointer, a double pointer and a triple pointer, how to set them to the memory address of a variable, how to print the value stored at a memory address and how to dereference a pointer variables. Oct 25, 2025 · In C, double pointers are those pointers which stores the address of another pointer. The first pointer is used to store the address of the variable, and the second pointer is used to store the address of the first pointer. That is why they are also known as a pointer to pointer.
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