Creative usage of string copy functions

 memset(szData2, 0, sizeof(szData2));
 strncpy(szData2, szData1, strlen(szData1)-1);
 strcpy(szData1, szData2);

Actually, It is same as below:

 *(szData1+strlen(szData1)-1) = '\0';

or

 szData1[strlen(szData1)-1] = '\0';