>>94
#include <stdio.h>
#include <string.h>

const char *alphabet = "abcdefghijklmnopqrstuvwxyza";
const char *number = "01234567890";

int main()
{
char buf[128];
int i = 0;
printf("Input phrase : ");
gets(buf);

while (buf[i] != '\0') {
if ('a' <= buf[i] && buf[i] <= 'z') {
putchar(alphabet[buf[i] - 'a' + 1]);
} else if ('0' <= buf[i] && buf[i] <= '9') {
putchar(number[buf[i] - '0' + 1]);
}
i++;
}

return 0;
}