字符串单词反转

• 字符串翻转，给定一个字符串，逐个翻转字符串中每个单词，
  例如，输入“the sky is blue”，输出“blue is sky the”。
• 要区分空格和结尾的情况

/*c语言版本*/
#include 
#include 
#include 

void str_reverse(char* src)
{
	char* rev = (char*)malloc(strlen(src) + 1);
	int len = strlen(src);
	int i, j,left = 0, dst_pos;
	for (i = 0; i <= len; i++)
	{
		if(src[i] == ' ' || src[i]== '\0') 
		{
			dst_pos = len - i; 
			for (j = left; j < i; j++)
			{
				rev[dst_pos] = src[j];
				dst_pos++;
			}
			if (left==0)
				rev[dst_pos] = '\0';
			else
				rev[dst_pos] = ' ';
			left = i + 1;
		}	
	}
	int k = 0;
	while (rev[k] != '\0') {
		src[k] = rev[k];
		k++;
	}
}
int main()
{
	char src[] = "the sky is blue";
	printf("The outis:%s\n", src);
	str_reverse(src);
	printf("The outis:%s\n", src);
	return 0;
}
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/*c++版本*/
#include 
#include 
#include 
using namespace std;

void Str_Reverse(string& Src)
{
	vector<string> vec_Src;
	for(int i=0;i< Src.size();i++)
	{
		string temp_str = "";
		while (Src[i] != ' ' && Src[i] != '\0')
		{
			temp_str.push_back(Src[i]);
			i++;
		}
		vec_Src.push_back(temp_str);
		temp_str.clear();
	}
	Src.clear();
	for(int j = vec_Src.size() - 1;j >= 0; j--)
	{
		if (j == 0) Src += vec_Src[j];
		else Src += vec_Src[j] + " ";
	}
}
int main()
{
	string src = "the sky is blue";
	cout << src << endl;
	Str_Reverse(src);
	cout << src << endl;
	return 0;
}
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