C/C++ pointers
Pointers in C/C++ can sometimes be really confusing specially if you are a beginner or like me more used to Java. Here is a small program I found really useful in understanding c pointers:
#include <stdio.h>
int main() {
int int_var = 5;
int *int_ptr;
int_ptr = &int_var; // Put the address of int_var into int_ptr.
printf("int_ptr = 0x%08x\n", int_ptr);
printf("&int_ptr = 0x%08x\n", &int_ptr);
printf("*int_ptr = 0x%08x\n\n", *int_ptr);
printf("int_var is located at 0x%08x and contains %d\n", &int_var, int_var);
printf("int_ptr is located at 0x%08x, contains 0x%08x, and points to %d\n\n",
&int_ptr, int_ptr, *int_ptr);
}
If you compile and run the code you will get something similar to the following:
int_ptr = 0xbffff834 &int_ptr = 0xbffff830 *int_ptr = 0x00000005 int_var is located at 0xbffff834 and contains 5 int_ptr is located at 0xbffff830, contains 0xbffff834, and points to 5
The address of your variables are probably different from what I have here which is obvious. One thing you should pay attention to is the relationship between the value/address of the pointer and the address of the int variable.
