int  StringTrimRight(
   string&  string_var      // 要剪切的字符串
   );

void OnStart()
  {
//--- 定义源字符串（右侧六个空格）
   string text="All spaces on the right will be removed from this string      ";
//--- 在日志中显示源字符串
   PrintFormat("Source line:\n'%s'", text);
//--- 删除右侧的所有空格，并在日志中显示删除的字符数和结果字符串
   int num=StringTrimRight(text);
   PrintFormat("The StringTrimRight() function removed %d chars from the right side. Now the line looks like this:\n'%s'", num, text);

  /*
  结果
   Source line:
   'All spaces on the right will be removed from this string      '
   The StringTrimRight() function removed 6 chars from the right side. Now the line looks like this:
   'All spaces on the right will be removed from this string'
  */
  }