編程練習-自己寫一個strcpy

char *strcpy_(char *strDest, const char *strSrc){    // Error    if(strSrc == NULL)        return NULL;    const char* p = strSrc;//const在?*號左邊，指標可以變，所指物不能變！    char* q = strDest;    p = strSrc;    q = strDest;    while(*p != '\0')        *q++ = *p++;    *q = '\0';    return strDest;}//標準答案，簡潔明快！char * __cdecl strcpy__(char * dst, const char * src) {    char * cp = dst;    while( *cp++ = *src++ ) ; /* Copy src over dst */    return( dst );}