CaesarCode

//poj:2975
#include<stdio.h>
#include<string.h>

void decipher(char message[]);
int main()
{
	char message[201];
	gets(message);
	while(strcmp(message,"START")==0)
	{
		decipher(message);
		printf("%s
",message);
		gets(message);
	}
	return 0;
}

void decipher(char msg[])
{
	char plain[]="VWXYZABCDEFGHIJKLMNOPQRSTU";
	char cipherEnd[201];
	int i,cipherLen;
	gets(msg);
	cipherLen=strlen(msg);
	for(i=0;i<cipherLen;i++)
	{
		if(msg[i]>='A'&&msg[i]<='Z')
			msg[i]=plain[msg[i]-'A'];
	}
	gets(cipherEnd);
	return;
}