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harmful !!”£¬²¢½¨ÒéÈ¡ÏûgotoÓï¾ä¡£ÒòΪgotoÓï¾ä²»ÀûÓÚ³ÌÐò´úÂëµÄά»¤ÐÔ¡£
 
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    #define FREE(p) if(p) { \
                        free(p); \
                        p = NULL; \
                    }
 
    main()
    main()
    {
        char *fname=NULL, *lname=NULL, *mname=NULL;
 
        fname = ( char* ) calloc ( 20, sizeof(char) );
        if ( fname == NULL ){
goto ErrHandle;
        }
 
        lname = ( char* ) calloc ( 20, sizeof(char) );
        if ( lname == NULL ){
            goto ErrHandle;
        }
 
        mname = ( char* ) calloc ( 20, sizeof(char) );
        if ( mname == NULL ){
            goto ErrHandle;
        }
 
        ......
 
 
     ErrHandle:
     ErrHandle:
  &nb