Here is my C code in Yahtzee, my main problem is when I type something that's not in integer between 1-13, like typing an alphabetical input, it will go for infinite loop, how can i use a do-while loop to avoid this? since I've been trying for so long and still couldn't figure it out.

#include "header.h"

//DISPLAY THE GAME MENU

void game_menu(void) {

int menu_option = 0;

do {

printf("Yahtzee: ");

printf("1. Print Game Rules. ");

printf("2. Play Game. ");

printf("3. Exit. ");

scanf("%d", &menu_option);

switch (menu_option) {

case 1:

system("cls");

printf("Hello ");

game_rules();

break;

case 2:

run_game();

break;

case 3:

printf("Goodbye! ");

//exit(1);

break;

default:

printf("Not an option! ");

}

}while (menu_option != 3);

}

//PRINT THE GAME RULES

void game_rules(void) {

printf("The scorecard used for Yahtzee is composed of two sections. A upper section and a lower section. ");

printf("A total of thirteen boxes or thirteen scoring combinations are divided amongst the sections. ");

printf("The upper section consists of boxes that are scored by summing the value of the dice matching the faces of the box. ");

printf("If a player rolls four 3's, then the score placed in the 3's box is the sum of the dice which is 12. ");

printf("Once a player has chosen to score a box, it may not be changed and the combination is no longer in play for future rounds. ");

printf("If the sum of the scores in the upper section is greater than or equal to 63, then 35 more points are added to the players overall score as a bonus. ");

printf("The lower section contains a number of poker like combinations. See the table provided below: ");

printf("******Name***********************Combination************************************Score*************** ");

printf("Three-of-a-kind Three dice with the same face Sum of all face values on the 5 dice ");

printf(" Four-of-a-kind Four dice with the same face Sum of all face values on the 5 dice ");

printf(" Full house One pair and a three-of-a-kind 25 ");

printf(" straight A sequence of four dice 30 ");

printf(" Large straight A sequence of five dice 40 ");

printf(" Yahtzee Five dice with the same face 50 ");

printf(" Chance May be used for any sequence of dice; Sum of all face values on the 5 dice ");

printf(" this is the catch all combination ");

}

//ROLL A DICE

int roll_dice(void) {

return (rand() % 6) + 1;

}

//SCORE for players

int run_game(void) {

int p1_score = 0, p2_score = 0;

for (int i = 0; i < 14; i++) {

printf("Player 1's turn! ");

p1_score += round_start();

printf("Player 1's total score: %d ", p1_score);

printf("Player 2's turn! ");

p2_score += round_start();

printf("Player 2's total score: %d ", p2_score);

if (p1_score >= 63) {

p1_score += 35;

if (p1_score > p2_score) {

printf("Player 1's score: %d, Player 2's score: %d, Player 1 wins!", p1_score, p2_score);

exit(1);

}

}

else if (p2_score >= 63) {

p2_score += 35;

if (p1_score < p2_score) {

printf("Player 1's score: %d, Player 2's score: %d, Player 2 wins!", p1_score, p2_score);

exit(1);

}

else {

printf("Player 1 and 2 have the same score: %d, the game ties.", p1_score);

exit(1);

}

}

}

}

//displays the results between two players

//PLAYER'S TURN

int round_start(void) {

printf("Press ENTER to roll the dice! ");

getchar(); getchar();

int dice_value[5], rolls = 0;

for (int i = 0; i < 5; i++)

dice_value[i] = roll_dice();

do {

//Players have three chances to re-roll

if (rolls < 3) {

char yn;

for (int i = 0; i < 5; i++)

printf("Dice %d: %d ", (i + 1), dice_value[i]);

//prompts players to choose the combinations

printf("Would you like to use this role for a game combination?(press Y for yes or N for no) ");

scanf(" %c", &yn);

if (yn == 'Y' || yn == 'y') {

break;

}

else if (yn == 'N' || yn == 'n') {

//prompt players if they want to take a chance to re-roll

for (int i = 0; i < 5; i++) {

char answer;

do {

printf("Would you like to re-roll the dice %d? ", (i + 1));

scanf(" %c", &answer);

answer = tolower(answer);

if (answer == 'y') {

dice_value[i] = roll_dice();

break;

}

else if (answer == 'n') {

dice_value[i] = dice_value[i];

break;

}

} while (answer != 'y' || answer != 'n');

}

}

rolls++;

}

else if (rolls == 3) {

break;

}

} while (rolls <= 3);

//displays the dice numbers and values

for (int i = 0; i < 5; i++)

printf("Dice %d. %d ", (i + 1), dice_value[i]);

//tells the players for the point of the round

int points = choose_comb(dice_value);

printf("Points of this round: %d ", points);

return points;

}

//Choose the combinations.

int choose_comb(int *dice_value) {

int choose_number = 0;

printf("1. Sum of 1's. ");

printf("2. Sum of 2's. ");

printf("3. Sum of 3's. ");

printf("4. Sum of 4's. ");

printf("5. Sum of 5's. ");

printf("6. Sum of 6's. ");

printf("7. Three of a Kind. ");

printf("8. Four of a Kind. ");

printf("9. Full House. ");

printf("10. Small Straight. ");

printf("11. Large Straight. ");

printf("12. Yahtzee. ");

printf("13. Chance ");

printf("Please choose an option: ");

scanf("%d", &choose_number);

//use the combinations depending player's option and calculate score

int count, sum = 0;

int dice_check[6] = { 0 };

for (int i = 0; i < 5; i++) {

sum += dice_value[i];

switch (choose_number) {

for (int i = 0; i < 5; i++)

sum += dice_value[i];

//Sum of ONES

case 1:

return sum_up_score(1, dice_value);

break;

//Sum of TWOS

case 2:

return sum_up_score(2, dice_value);

break;

//Sum of THREES

case 3:

return sum_up_score(3, dice_value);

break;

//Sum of FOURS

case 4:

return sum_up_score(4, dice_value);

break;

////Sum of FIVES

case 5:

return sum_up_score(5, dice_value);

break;

//Sum of SIXES

case 6:

return sum_up_score(6, dice_value);

break;

//THREE OF A KIND / FOUR OF A KIND

//since their combinations are in the same way, I grouped them in one function

case 7:

case 8:

for (int i = 0; i < 5; i++)

dice_check[dice_value[i] - 1] += 1;

int count = dice_check[0];

for (int i = 0; i <= 5; i++)

if (i == 4 && dice_check[4] < dice_check[5])

count = dice_check[5];

else if (dice_check[i] < dice_check[i + 1])

count = dice_check[i + 1];

if (count >= 3)

return sum;

break;

//FULL HOUSE

case 9:

for (int i = 0; i < 5; i++)

dice_check[dice_value[i] - 1] += 1;

for (int i = 0; i <= 5; i++)

for (int j = 0; j <= 5; j++)

if (dice_check[i] == 3 && dice_check[j] == 2) //check for three of a kind by i and pair by j

return 25;

break;

//SMALL STRAIGHT

case 10:

for (int i = 0; i < 4; i++)

count = 0;

for (int j = 0; j < 4; j++)

if (dice_value[i] = dice_value[j])

count++;

else

return 0;

if (count == 4)

return 30;

break;

//LARGE STRAIGHT

case 11:

for (int i = 0; i < 5; i++)

count = 0;

for (int j = 0; j < 5; j++)

if (dice_value[i] = dice_value[j])

count++;

else

return 0;

if (count == 5)

return 40;//check if there are 5 straight dices

break;

//YAHTZEE

case 12:

for (int i = 0; i < 7; i++)

for (int j = 0; j < 7; j++)

if (dice_value[i] != dice_value[j])

count++;

if (count == 5)

return 50;//check if there is a Yahtzee, if yes, return 50 points

break;

//CHANCE

case 13:

return sum;

break;

default:

printf("Please choose an option: ");

do {

choose_comb(dice_value);

} while ((isdigit(choose_number) == 0) || (choose_number < 1) || (choose_number > 13));

}

}

return 0;

}

//ADD UP THE SCORES

int sum_up_score(int quantity, int dice_value[]) {

int count = 0;

for (int i = 0; i < 5; i++)

if (dice_value[i] == quantity)

count++;

return count * quantity;

}