pascode.c

#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main(int argc, const char * argv[])
{
    int r,c;
    char* a = "vs lbh pna frr guvf zrffntr, jrypbzr gb wbva gghpfp!";
    for(r=1;r<26;r++){
        for(c=0;c<strlen(a);c++){
            if(isalpha(a[c])){
                int t = a[c]-'a';
                t = (t+r)%26;
                t = t+'a';
                printf("%c",t);
            }else{
                printf("%c",a[c]);
            }
        }
        printf("\n");
    }
    return 0;
}