pat 乙级1031 查验身份证

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

int main()
{
    int n;
    scanf("%d", &n);
    char id[n][19];
    int num[17] = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
    char num2[11] = {'1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'};
    int i = 0, j = 0;
    int count = 0;
    for (i = 0; i < n; i++)
    {
        scanf("%s", id[i]);
    }
    int sum = 0;
    int flag = 1;
    int flag2 = 1;
    for (i = 0; i < n; i++)
    {
        flag = 1;
        sum = 0;
        for (j = 0; j < 17; j++)
        {
            if (id[i][j] >= '0' && id[i][j] <= '9')
            {
                sum = sum + (id[i][j] - '0') * num[j];
            }
            else
            {
                flag = 0;
                break;
            }
        }
        if (num2[sum % 11] == id[i][17] && flag == 1)
        {
            count++;
            continue;
        }
        if (flag2 == 1)
        {
            printf("%s", id[i]);
            
        }
        if (flag2 == 0)
        {
            printf("\n%s", id[i]);
        }
        flag2 = 0;
    }
    if (count == n)
    {
        printf("All passed");
    }
    return 0;
}