Analog implementation strcpy

The known strcpy prototypes are:

Char *strcpy (char *dst,char *src);

Program code:

#include <stdio.h>

#include <assert.h>

Char *my_strcpy (char *DST, const char *srt)

{

ASSERT (DST);

ASSERT (SRT);

char *cp = DST;

while (*cp++ = *srt++);

return DST;

}

int Main ()

{

Char str[10];

         char arr["= "ABCD"

char *ret = my_strcpy (str, arr);

printf ( "%s\n", ret);

System ( "pause");

return 0;

}

1.Const modifier

The source string parameter is modified with a const to prevent the source string from being modified.

2. null pointer check

(A) do not check the validity of pointers, indicating that you do not pay attention to the robustness of the code.

(B) Use assert (DST && src) when checking the validity of pointers.

Hope to help everyone, thank you!

Analog implementation strcpy