题解 | #逆序输出#

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <assert.h>

void my_reverse(char* left , char* right)
{
	assert(left);
	assert(right);

	while (left < right)
	{
		*left ^= *right;
		*right ^= *left;
		*left++ ^= *right--;
	}
}


int main()
{
	char arr[100] = { 0 };
	gets(arr);
	int len = strlen(arr);
	my_reverse(arr, arr + len - 1);

	char* start = arr;
	char* end = start;

	while (1)
	{
		while (*end != ' ' && *end != '\0')
		{
			end++;
		}
		my_reverse(start, end-1);
		if (*end != '\0')
		{
			end++;
			start = end;
		}
		else break;
	}
	printf("%s", arr);
	return 0;
}