循环程序运行一次后不能执行了，而且题目还有要求

附件是题目，求解答，为什么程序只能运行两次

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<stdbool.h>
int roll_dice(void);
bool play_game(void);
char s=0;
int m, n;
int main()
{
    srand((unsigned)time(NULL));
    play_game();
    printf("Play again?");
    while (1) {
        scanf_s("%c", &s,1);
        if (s == 'y' || s == 'Y')
        {
            play_game();
        }
        else
        {
            break;
        }
        printf("Play again?");
    }
    printf("Wins:%d Losses:%d", m, n);
    return 0;
}
int roll_dice(void)
{
    int a, b;
   
    a = rand() % 6 + 1;
    b = rand() % 6 + 1;
    printf("You rolled:%d\n", a + b);
    return a+b;
}
bool play_game()
{
    int i, j = 0;
    i = roll_dice();
            if (i == 7 || i == 11)
            {
                printf("You win!\n");
                m++;
                return true;

            }
            else if (i == 2 || i == 3 || i==12)
            {
                printf("You lose!\n");
                n++;
                return false;
            }
            else
            {
                j = i;
                printf("You point is %d\n", j);
                i = roll_dice();
            }
            while (1)
            {
                if (i == j)
                {
                    printf("You win!\n");
                    m++;
                    return true;
                }
                else if (i == 7)
                {
                    printf("You lose!\n");
                    n++;
                    return false;
                }
                else
                {
                    i = roll_dice();
                }
            }
}