删除字符串右边的全部空格

#include <iostream>using namespace std;//删除字符串右边的全部空格 char *my_trim( char *str ){     if (NULL == str)     {              throw;     }          char *const address = str;     const int ONE_ELEMENT = 1;     const char NULL_TERMINATED = '\0';          while (NULL_TERMINATED != *str)     {           ++str;     }          while (address != str && isspace( *(str - ONE_ELEMENT) ))     {           --str;     }          *str = NULL_TERMINATED;     str = address;          return str;}int main(int argc,char*argv[]){    char buf[] = "ok2002.com              ";        cout << strlen( buf ) << endl;    my_trim( buf );    cout << strlen( buf ) << endl;     system( "PAUSE" ); return EXIT_SUCCESS;}/*----2410请按任意键继续. . .-----------------------*/