【c语言】译密码。将字母变成其后的第4个字母，非字母不变

// 译密码。将字母变成其后的第4个字母，非字母不变

#include <stdio.h>

int main()
{
	char c;
	c = getchar();
	while( c != '\n' )
	{
		if( ( c >= 'a' && c <= 'z' ) || ( c >= 'A' && c <= 'Z' ) )
		{
			if( ( c >= 'w' && c <= 'z' ) || ( c >= 'W' && c <= 'Z' ) )
			{
				c = c - 22;	
			}
			else
				c = c + 4;
		}
		printf("%c",c);
		c = getchar();
	}
	printf("\n");
	return 0;
}

<img src="http://img.blog.csdn.net/20150424153229200?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvemhhb3lhcWlhbjU1Mg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

【c语言】译密码。将字母变成其后的第4个字母，非字母不变

原文：http://blog.csdn.net/zhaoyaqian552/article/details/45247231