Phonebook

#include<stdio.h>

struct address{
    int house;
    char area[10];
};
struct add_cont{
    char first_name[20];
    char last_name[20];
    long long cell;
    struct address addr;
};

int new_contact();
int search_old();
int main()
{
    int entry, test;
    char choice[100];

    printf("Welcome to Proloy Phone Book\n\n");

    for(;;){
        printf("\nFor New Contact,\nPress 1\n");
        printf("\nFor Searching Old Contact,\nPress 2\n");

        scanf("%d", &entry);

        switch(entry){
        case 1:
            new_contact();
          //printf("Enter a new number:\n");
          //scanf("%d", &test);
            break;
        case 2:
            search_old();
          //printf("Enter a new code:\n");
           //scanf("%d", &test);
            break;
        default:
            printf("Invalid Key word\nTry again :)\n");
            break;
        }

        printf("\nDo you want to continue?\nPress enter to your choice; 'Yes' or 'No'\n");

        scanf("%s", choice);

        if(choice[0]=='Y' || choice[0]=='y')
            continue;
        else if(choice[0]=='N' || choice[0]=='n'){
            printf("Thank you for using our phone book :)\n");
            break;
        }
        else{
            printf("Invalid Key word :/\n");
            printf("\nDo you want to continue?\nPress enter to your choice; 'Yes' or 'No'\n");
            scanf("%s", choice);
        }
    }

    return 0;
}

int new_contact()
{
    struct add_cont in1[10];
    int i=0, n, p;
    char choice[4];
    i=0;

    for(;;){
        i++;

        printf("Enter your first name  :");
        scanf("%s", in1[i].first_name);
        printf("Enter your last name   :");
        scanf("%s", in1[i].last_name);
        printf("Enter your cell number :");
        scanf("%lld", &in1[i].cell);
        printf("Enter your address     :");
        scanf("%lld", &in1[i].addr.house);
        scanf("%s", in1[i].addr.area);

       // i++;

        printf("\nDo you want to save another contact?\nIf you want, enter 'yes'\nIf you do not want, enter 'No'\n");
        scanf("%s", choice);

        if(choice[0]=='y')
            continue;
        else
            //return i;
            break;

    }

    printf("Enter the key word\t:");
    scanf("%d", &p);
    if(p>i)
        printf("Invalid :/\n");
    else
        printf("\nName\t: %s %s\nCell No\t: %011lld\nAddress\t: %d,%s\n", in1[p].first_name,in1[p].last_name,in1[p].cell,in1[p].addr.house,in1[p].addr.area);

}
int search_old()
{
  //  int n;

 //   n=new_contact(n);
   // printf("%d\n", n);

  //  if(i==0)
    //
    printf("Vuila gesi :3\n");

  //  return 0;
}