1- definition
A variable that contains a memory address, points to somewhere in the process’ virtual address space
2- dereference a pointer
#include <stdio.h> int main(int argc, char **argv) { int x = 42; int *p; // p is a pointer to an integer p = &x; // p now stores the address of x printf("x is %d ", x); *p = 99; printf("x is %d ", x); return 0; }
3- pointer acrethrim
More details can be refer with the link as below_ it's very good (in chinese ):
http://blog.csdn.net/u011974987/article/details/52270018