【C++】用C或C++實作void reverse(char* str)函數，即反轉一個null結尾的字元串

<span style="font-family: Arial, Helvetica, sans-serif;">//reverse a string *str</span>
           

<span style="font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="cpp">//null字元不用反轉，是以end指向字元串倒數第二個字元即可
           

//注意i++ 和++i的差別
           

//如果用遞歸處理這個問題呢？
           

void reverse (char* str)
{
	char* end = str;
	char temp;
	
	if(str)
	{
		while(*end)
		{
			++end;
		}
		--end; //the last char is null, so we decrease one step of end
		
		while(str < end)
		{
			temp = *str;
			*str++ = *end;
			*end-- = temp; //swap value, then increase *str, decrease *end
		}
	}
}