实现strcpy

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/*

 * author:lx

 * date: 2011-10-04

 * brief: strcpy

 */

 

#include <stdio.h>

#include <stdlib.h>

#include <assert.h>

 

void*

lx_strcpy( char *p, char *q )

{      

        char *address = q;

 

        for ( ; *p != '\0'; p++ )

        {

                assert( *q != '\0' );

                 

                *q = *p;

                q++;

        }

 

        return address;

}

 

int

main( void )

{

        char p[20] = "hello world";

        char d[50] = "what why how and which where!";

         

 

        printf ( "%s\n", (char*)lx_strcpy( p, d ) );

}