//@132屋里上课群
#include<stdio.h>
#include<stdlib.h>//颜色
using namespace std;
int jiami();
int jiemi();
int main()
{
printf("************************************************************
");
printf("* 凯撒Caesar *
");
printf("* *
");
printf("* 1.加密 *
");
printf("* 2.解密 *
");
printf("* 【注】:退出请按0 *
");
printf("************************************************************
");
system("color 40");
int id;
printf("【键入操作代号】:");
scanf("%d",&id);
switch(id)
{
case 1:
jiami();
break;
case 2:
jiemi();
break;
case 0:
system("color 40");
return 0;
default:
main ();
}
return 0;
}
/***********加密*************/
int jiami()
{
int ii=1,kk=2;
printf("[键入完成请输入'/']
");
printf("———————————————————————————————————————————————————
");
printf("[明文信息]
");
char miw[150];
char mingw[100];
for(ii;ii<100;ii++)
{
mingw[ii]=getchar();
if(mingw[ii]<=120&&mingw[ii]>=97)
{
miw[ii]=mingw[ii]+3;
continue;
}
if(mingw[ii]=='x')
{
miw[ii]='a';
}
if(mingw[ii]=='y')
{
miw[ii]='b';
}
if(mingw[ii]=='z')
{
miw[ii]='c';
}
if(mingw[ii]==' ')
{
miw[ii]=' ';
}
if(mingw[ii]=='/')
{
printf("
");
printf("[密文信息]
");
system("color 50");
break;
}
}
for(kk;kk<ii;kk++)
{
if(miw[kk]==' ')
{
printf(" ");
continue;
}
printf("%c",miw[kk]);
}
printf("
");
int id;
printf("———————————————————————————————————————————————————
");
printf("【键入操作代号】:");
scanf("%d",&id);
switch(id)
{
case 1:
jiami();
break;
case 2:
jiemi();
break;
default:
main ();
case 0:
system("color 40");
return 0;
}
return 0;
}
/***********解密*************/
int jiemi()
{
int ii=1,kk=1;
printf("[键入完成请输入'/']
");
printf("———————————————————————————————————————————————————
");
printf("[密文信息]
");
char miw[150];
char mingw[100];
for(ii;ii<100;ii++)
{
miw[ii]=getchar();
if(miw[ii]<=123&&miw[ii]>=100)
{
mingw[ii]=miw[ii]-3;
continue;
}
if(miw[ii]=='a')
{
mingw[ii]='x';
}
if(miw[ii]=='b')
{
mingw[ii]='y';
}
if(miw[ii]=='c')
{
mingw[ii]='z';
}
if(miw[ii]==' ')
{
mingw[ii]=' ';
}
if(miw[ii]=='/')
{
printf("
");
printf("[明文信息]
");
system("color 60");
break;
}
}
for(kk;kk<ii;kk++)
{
if(mingw[kk]==' ')
{
printf(" ");
continue;
}
printf("%c",mingw[kk]);
}
printf("
");
int id;
printf("———————————————————————————————————————————————————
");
printf("【键入操作代号】:");
scanf("%d",&id);
switch(id)
{
case 1:
jiami();
break;
case 2:
jiemi();
break;
case 0:
system("color 40");
return 0;
default:
main ();
}
return 0;
}
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