3加密算法.cpp

此程序为3栏栅加密算法程序

//学校：武汉理工大学
//qq号：297416605
//姓名：万艳良
#include<iostream.h>
void main()
{
	char a[50],b;
	int i=0,m,n,o;

	//加密
	cout<<"Please input the P-text(ended with the letter z):"<<endl;
	cin>>b;
    a[i]=b;
	i++;
	while(b!='z')
	{ 
		cin>>b;
		if(b=='z')
			a[i]=' ';
		else
		   a[i]=b;
		i++;
	}
	i--;
	//输出密文
	cout<<"the C-text is:"<<endl;
	for(m=0;m<=i-1;m+=3)
	{
		cout<<a[m]<<"";
	}
	for(n=1;n<=i-1;n+=3)
	{
		cout<<a[n]<<"";
	
	}
	for(o=2;o<=i-1;o+=3)
	{
		cout<<a[o]<<"";
	
	}
	cout<<endl;

}