C Programming Tutorial - 42 - Pointers

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <math.h>

int main()
{
    int tuna = 19;

    printf("Address \t Name \t Value \n");

    // &tuna means "the memory address of tuna"
    printf("%p \t %s \t %d \n", &tuna, "tuna", tuna);

    // pointers are special variables that hold the memory address of other variables
    int * pTuna = &tuna;

    // now you can use pTuna instead of &tuna
    printf("%p \t %s \t %d \n", pTuna, "tuna", tuna);

    // here is the info for pTuna
    printf("%p \t %s \t %p \n", &pTuna, "pTuna", pTuna);

    return 0;
}