迅雷笔试 字符串反转 C库函数 strrev

char* my_strrev( char* string )
{
 char *left, *right, ch;
 left = right = string;
 while( *right++ != '\0');
 right -= 2;
 while( left<right )
 {
  ch = *left;
  *left = *right;
  *right = ch;
  ++left; --right;
 }
 return string;
}
// 测试代码
int _tmain( int argc, TCHAR* argv[] )
{
 char szBuf[10] = {0};
 strcpy_s( szBuf, "hello" );
 printf( "%s", my_strrev(szBuf) );
 system( "pause" );
 return 0;
}