一些实用程序

/*删除一个字符*/
int delete_string(char str[], char ch)
{
     int i = 0;
     int j = 0;
     
     for (; str[i] != '\0';i++)
     {
           if ( str[i] != ch )
           {
                str[j++] = str[i];
            }
      }
      str[j] = '\0';
      return 0;
}