Sorting and Searching (by Name)

#include <iostream>
#include <stdlib.h>
#include <string.h>

using namespace std;

struct data_user{
    char nama[50];
    int umur;
};

data_user user[100], temp;


void input_data(int posisi){
    cin.ignore();
    cout<<"Masukan Nama = ";
    cin.getline(user[posisi].nama, 50);
    cout<<"Masukan Umur = ";
    cin>>user[posisi].umur;
}


void sorting_name_asc(int posisi){
    int huruf1, huruf2;
    for(int a=0; a<posisi; a++){
        for(int b=a+1; b<posisi; b++){

            huruf1 = int(user[a].nama[0]);
            huruf2 = int(user[b].nama[0]);

            if(huruf1 < 97)
                huruf1 = huruf1 + 32;
            if(huruf2 < 97)
                huruf2 = huruf2 + 32;

            if(huruf1 > huruf2 ){
                    strcpy(temp.nama, user[a].nama);
                    temp.umur = user[a].umur;

                    strcpy(user[a].nama, user[b].nama);
                    user[a].umur = user[b].umur;

                    strcpy(user[b].nama, temp.nama);
                    user[b].umur = temp.umur;
            }
            else if(huruf1 == huruf2 ){
                int arr = 0;
                while(true){

                huruf1 = int(user[a].nama[arr]);
                huruf2 = int(user[b].nama[arr]);
                if(huruf1 < 97)
                    huruf1 = huruf1 + 32;
                if(huruf2 < 97)
                    huruf2 = huruf2 + 32;

                    if(huruf1 > huruf2){
                        strcpy(temp.nama, user[a].nama);
                        temp.umur = user[a].umur;

                        strcpy(user[a].nama, user[b].nama);
                        user[a].umur = user[b].umur;

                        strcpy(user[b].nama, temp.nama);
                        user[b].umur = temp.umur;
                        break;
                    }
                    if(huruf1 < huruf2)
                        break;
                    arr++;
                }
            }

            if(b == posisi-1){
                break;
            }
        }
    }
}

void sorting_name_desc(int posisi){
    int huruf1, huruf2;
    for(int a=0; a<posisi; a++){
        for(int b=a+1; b<posisi; b++){

            huruf1 = int(user[a].nama[0]);
            huruf2 = int(user[b].nama[0]);
            if(huruf1 < 97)
                huruf1 = huruf1 + 32;
            if(huruf2 < 97)
                huruf2 = huruf2 + 32;

            if(huruf1 < huruf2 ){
                    strcpy(temp.nama, user[a].nama);
                    temp.umur = user[a].umur;

                    strcpy(user[a].nama, user[b].nama);
                    user[a].umur = user[b].umur;

                    strcpy(user[b].nama, temp.nama);
                    user[b].umur = temp.umur;
            }

            else if(huruf1 == huruf2){
                int arr = 0;
                while(true){
                    huruf1 = int(user[a].nama[arr]);
                    huruf2 = int(user[b].nama[arr]);
                    if(huruf1 < 97)
                        huruf1 = huruf1 + 32;
                    if(huruf2 < 97)
                        huruf2 = huruf2 + 32;

                    if(huruf1 < huruf2){
                        strcpy(temp.nama, user[a].nama);
                        temp.umur = user[a].umur;

                        strcpy(user[a].nama, user[b].nama);
                        user[a].umur = user[b].umur;

                        strcpy(user[b].nama, temp.nama);
                        user[b].umur = temp.umur;
                        break;
                    }
                    if(huruf1 > huruf2)
                        break;
                    arr++;
                }
            }
        }
    }
}

void search_by_name(int posisi){
    char nama[20];
    bool cek, sub_cek;
    int cari, sub_cari, huruf1, huruf2;
    int ketemu = 0;
    cin.ignore();
    cout<<"Masukan Nama yang ingin Dicari : ";
    cin.getline(nama, 20);
    for(int x = 0; x<posisi; x++){
        cek = true;
        cari = 0;

        while(nama[cari]!='\0'){
            huruf1 = int(user[x].nama[cari]);
            huruf2 = int(nama[cari]);
            if(huruf1 < 97)
                huruf1 = huruf1 + 32;
            if(huruf2 < 97)
                huruf2 = huruf2 + 32;

            if(user[x].nama[cari] != nama[cari] || huruf1 != huruf2)
                cek = false;
            cari++;
        }

        if(!cek){
            bool finded = false;
            sub_cek = false;
            cari = 0;
            sub_cari = 0;

            huruf1 = int(user[x].nama[sub_cari]);
            huruf2 = int(nama[cari]);

            if(huruf1 < 97)
                huruf1 = huruf1 + 32;
            if(huruf2 < 97)
                huruf2 = huruf2 + 32;

            while(user[x].nama[sub_cari]!='\0'){
                huruf1 = int(user[x].nama[sub_cari]);
                huruf2 = int(nama[cari]);
                if(huruf1 < 97)
                    huruf1 = huruf1 + 32;
                if(huruf2 < 97)
                    huruf2 = huruf2 + 32;
                if(user[x].nama[sub_cari] == nama[cari] || huruf1 == huruf2){
                    while(nama[cari]!='\0'){
                        huruf1 = int(user[x].nama[sub_cari]);
                        huruf2 = int(nama[cari]);
                        if(huruf1 < 97)
                            huruf1 = huruf1 + 32;
                        if(huruf2 < 97)
                            huruf2 = huruf2 + 32;

                        if(user[x].nama[sub_cari] != nama[cari] || huruf1 != huruf2){
                            finded = false;
                            break;
                        }
                        else
                            finded = true;
                        cari++;
                        sub_cari++;
                    }
                    if(finded){
                        sub_cek = true;
                    }
                }
                if(!sub_cek)
                    sub_cari++;
                else
                    break;
            }
        }

        if(cek || sub_cek){
            cout<<"Nama = "<<user[x].nama<<endl;
            cout<<"Umur = "<<user[x].umur<<endl;
            cout<<endl<<endl;
            ketemu++;
        }
        if(ketemu == 0 && x == posisi){
            cout<<"Data Tidak Ditemukan"<<endl;
        }
    }
}

void view_data(int posisi){
    for(int b = 0; b<posisi; b++){
        cout<<"Nama = "<<user[b].nama<<endl;
        cout<<"Umur = "<<user[b].umur<<endl;
    }
}

int main(){
    int posisi = 0, pil;
    bool ulang;
    do{
        ulang = true;
        cout<<"1. Input The Data "<<endl;
        cout<<"2. Ascending Sorting"<<endl;
        cout<<"3. Descending Sorting"<<endl;
        cout<<"4. View The Data"<<endl;
        cout<<"5. Searching"<<endl;
        cout<<"6. End of Program"<<endl;
        cout<<"Masukan Pilihan Anda = ";
        cin>>pil;
        switch(pil){
            case 1:
                input_data(posisi);
                posisi++;
                break;
            case 2:
                sorting_name_asc(posisi);
                break;
            case 3:
                sorting_name_desc(posisi);
                break;
            case 4:
                view_data(posisi);
                break;
            case 5:
                search_by_name(posisi);
                break;
            case 6:
                ulang = false;
                break;
            default:
                cout<<"Pilihan Tidak ada"<<endl;
                break;
        }

        system("PAUSE");
        system("CLS");
    }while(ulang);
}