笔试题：删除字符串的空格并返回空格数目

以下是C的实现代码：

long  DelStrSpace(char* _strIn, char* _strOut)     //delete the space of string

{

       long  _spaceNumber = 0;

       char* p = _strIn;

       char* q = p + 1;                             //1234 5   6 7 8   9

 

       while (*p)

       {

              if (*p == 32 /* *p == ' '*/)

              {

                     _spaceNumber++;                          

              }

              else

              {

                     *_strOut = *p;

                     _strOut++;

              }

              p = q;           

              q++;             

       }

       *_strOut = '/0';

 

       return _spaceNumber;

}