thing.c

linux下的Ｃ语言开发

/*-*/
/********************************************************
 * Name: Pointer demo					*
 *							*
 * Purpose: Show how pointers can be used.		*
 *							*
 * Usage: Not a useful program.  			*
 ********************************************************/
/*+*/
#include <stdio.h>
int main()
{
    int   thing_var;  /* define a variable for thing */
    int  *thing_ptr;  /* define a pointer to thing */

    thing_var = 2;      /* assigning a value to thing */
    printf("Thing %d\n", thing_var);

    thing_ptr = &thing_var; /* make the pointer point to thing */
    *thing_ptr = 3;     /* thing_ptr points to thing_var so */
                        /* thing_var changes to 3 */
    printf("Thing %d\n", thing_var);

    /* another way of doing the printf */
    printf("Thing %d\n", *thing_ptr);
    return (0);
}