K&R(5.5): Character Pointers and Functions

/* k&r(5.5): Character Pointers and Functions
   created on Mar 21, 2011
 */
#include    "stdio.h"
#define     MAX 1000
void astrcpy(char *, char *);
void pstrcpy(char *, char*);

/* main: copy of  two strings */

int main()
{
    char ps[] = "Hello Mark";
    char pt[MAX];

    pstrcpy(pt, ps);
    printf("%s\n",  pt);
    return 0;
}

/* strcpy: copy t to s; array subscript version */
void astrcpy(char *s, char *t)
{
    int i;

    i = 0;
    while((s[i] = t[i]) != '\0')
      i++  ;
}

/* strcpy: copy t to s; pointer version */
void pstrcpy(char *s, char *t)
{
    while ((*s++ = *t++))
    ;
}