The Windows platform does not provide a two string manipulation function.

When looking at some open source code, we often see some string manipulation functions, which are available under the Linux platform, but MS is not provided on the Windows platform. Therefore, the software must be implemented by itself. Common Library functions are:

Obtains a copy of the current character, freeing the memory externally. Char *strdup (const char *src)  {    int             len;    Char           *dst;    len = strlen (src) + 1;    if (DST = (char *) malloc (len)) = = null)        return (null);    strcpy (DST, SRC);    return (DST);} Set environment variable int setenv (const char *name, const char *value, int overwrite)  {    char           *cp;    int             ret;    if (overwrite = = 0) {        if (getenv (name))            return 0;    }    CP = (char *) malloc (strlen (name) + strlen (value) + 2);    if (cp = = NULL)        return-1;    sprintf (CP, "%s=%s", name, value);    RET = PUTENV (CP); #ifdef WIN32 free    (CP); #endif    return ret;}

The Windows platform does not provide a two string manipulation function.