加密的病例单

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#include<iostream>
#include<cstring>
using namespace std;
char s[55];
char d[55];
int main()
{
	gets_s(s);
	int len = strlen(s);
	s[len] = '\0';
	d[len] = '\0';
	for (int i = 0; i < len; i++)
	{
		if (s[i] >= 'A' && s[i] <= 'Z')
		{
			s[i] = s[i] + 32;
		}
		else if (s[i] >= 'a' && s[i] <= 'z')
		{
			s[i] = s[i] - 32;
		}
	}
	for (int i = 0; i < len; i++)
	{
		d[i] = s[len - i - 1];
	}
	for (int i = 0; i < len; i++)
	{
		if ((d[i] >= 'A' && d[i] <= 'W') || (d[i] >= 'a' && d[i] <= 'w'))
			d[i] = d[i] + 3;
		else if ((d[i] >= 'X' && d[i] <= 'Z') || (d[i] >= 'x' && d[i] <= 'z'))
		{
			d[i] = d[i] - 23;
		}
	}
	cout << d << endl;
	return 0;
}