POJ-1248

#include<iostream>
#include<string>
using namespace std;

int main(int argc, char *argv[]){
	string cipher;
	while(getline(cin,cipher),cipher!="ENDOFINPUT"){
		if(cipher=="START"||cipher=="END"){
			continue;
		}
		string plainText="";
		for(int i=0;i<cipher.length();i++){
			if(cipher[i]>='A' && cipher[i]<='Z'){
				if(cipher[i]-5<'A'){
					plainText+=cipher[i]+25-4;
					//cout<<plainText<<endl;
				}else{
					plainText+=cipher[i]-5;
					//cout<<plainText<<endl;
				}
			}else{
				plainText+=cipher[i];
				//cout<<plainText<<endl;
			}
		}

		cout<<plainText<<endl;
	}



	return 0;
}

POJ-1248

原文：http://blog.csdn.net/eddy_liu/article/details/47206843