#include<stdio.h>
#include<stdlib.h>
#include <string.h>
int i = 0;
void registor()
{
    struct regis
    {
        char id[10], name[20], sur[20], pnum[20], mail[100], pass1[10], pass2[10];
    };
    struct regis r[50];
    int j = 0;
    int a = 0;
    printf(" [Registration] \n");
    printf("Please enter the following information \n");
    printf("ID: ");
    scanf("%s", r[i].id);
    while(strlen(r[i].id) != 7)
    {
        printf("[ERROR] You can use only 7 digits for ID\n [Re-type] ID: ");
        scanf("%s", r[i].id);
    }
    /*for(j = 0; j <= strlen(r[i].id); j++)
    {
        if(check to not have alphabet)
        {
            printf("[ERROR] You must use only 10 digit numbers for phone number\n [Re-type] Phone Number: ");
            scanf("%s", r[i].pnum);
        }
    }*/
    printf("First Name: ");
    scanf("%s", r[i].name);
    printf("Last Name: ");
    scanf("%s", r[i].sur);
    printf("Phone Number: ");
    scanf("%s", r[i].pnum);
    if(strlen(r[i].pnum) == 10){
            a=1;
    }else{
        while(a == 0){
        printf("[ERROR] You must use only 10 digit numbers for phone number\n [Re-type] Phone Number: ");
        scanf("%s", r[i].pnum);
        if(strlen(r[i].pnum) == 10){
            a=1;
        }
    }
    }
    // while(strlen(r[i].pnum) != 10)
    // {
    //     printf("[ERROR] You must use only 10 digit numbers for phone number\n [Re-type] Phone Number: ");
    //     scanf("%s", r[i].pnum);
    // }
    int k, g, m = 0;
    printf("Email: ");
    scanf("%s", r[i].mail);
    for(k = 0; k <= 1; k--)
    {
        for(j = 0; j <= strlen(r[i].mail); j++)
        {
            if(r[i].mail[j] == '@')
            {
                for(g = 0; g <= strlen(r[i].mail); g++)
                {
                    if(r[i].mail[g] == '.')
                    {
                        m = 1;
                        g = strlen(r[i].mail)+1;
                        k = 5;
                    }
                }
            }
        }
        if(m == 0)
        {
            printf("[ERROR] You must contain character both of @ and .\n [Re-type] Email: ");
            scanf("%s", r[i].mail);
        }
    }
    printf("Password: ");
    scanf("%s", r[i].pass1);
    while(strlen(r[i].pass1) != 8)
    {
        printf("[ERROR] You must use at least 8 characters for password\n [Re-type] Password: ");
        scanf("%s", r[i].pass1);
    }
    printf("Confirmed Password: ");
    scanf("%s", r[i].pass2);
    for(j = 0; j <= 7; j++)
    {
        if((r[i].pass2[j] != r[i].pass1[j]))
        {
            printf("[ERROR] These passwords don't match\n [Re-type] Confirmed Password: ");
            scanf("%s", r[i].pass2);
        }

    }
    printf("\n-- End of the Registration Process --\n");
    printf("Congratulation!! %s,\n", r[i].name);
    i++;
    printf("Now you can login to the ICT Contact Management System and start to\n search for ICT faculty staffs' and friends' information.\n");
}
int main()
{
    registor();
}