Simpler Shift Cipher encryption program using C

Enc_Dec.c

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

int main () {
    char word[100];
    int OFFSET = 1;

    printf("Enter a string: ");
    scanf("%s", word);
    printf("Enter Offset: ");
    scanf("%d", &OFFSET);

    printf("Encoded Word: ");

    for (int i = 0; i < strlen(word); i++) {
        printf("%c", word[i] + OFFSET)  ;
    }

    printf("\nDecoded Word: ");

    for (int i = 0; i < strlen(word); i++) {
        printf("%c", word[i]);
    }
    printf("\n");

    return 0;
}