caesar.cpp

#include <iostream>
#include <string>
#include <ctype.h>

using std::string;
using std::cin;
using std::cout;
using std::endl;
using std::getline;

int main()
{
    string text;
    char c;
    int i, j;
    getline(cin, text);
    for (i = 1; i <= 26; i++) {
        for (j = 0; text[j]; j++) {
            c = text[j];
            if (isalpha(c)) {
                c -= 'A';
                c += i;
                c %= 26;
                c += 'A';
            }
            cout << c;
        }
        cout << endl;
    }
}