Question

译密码。A变成字母E,a变成e即变成其后的第四个字母，W变A，X变B，Y变C，Z变D。请修改下面程序，并指出错误

#include<iostream>
using namespace std;
int main()
{ char c;
while((c=getchar()!='\n'))
{if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
{ c=c+4;
if((c>'Z'&&c<='Z'+4)||(c>'z'&&c<='z'+4))c=c-26;
}
cout<<c;
}

cout<<endl;
system("pause");
return 0;
}

Answer 1

#include<iostream>
using namespace std;
int main()
{
char c;
while((c=getchar())!='\n') // 括号错了, 导致c恒等于1
{
if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
{
c=c+4;
if((c>'Z'&&c<='Z'+4)||(c>'z'&&c<='z'+4))c=c-26;
}
cout<<c;
}

cout<<endl;
system("pause");
return 0;
}