/* Prompt the user to enter a number and read in the input */
printf("Enter an integer between 1 and 100 (inclusive): ");
scanf("%d", &num);

/* Keep asking for the input until a valid integer is entered */
while (num < 1 || num > 100) {
    printf("Invalid input. Enter an integer between 1 and 100 (inclusive): ");
    scanf("%d", &num);
}

/* Check whether the input is even or odd and print out a message */
if (num % 2 == 0) {
    printf("%d is even.\n", num);
} else {
    printf("%d is odd.\n", num);
}

return 0;