Vote poll

#include<bits/stdc++.h>
#include<stdio.h>
#include<stdlib.h>
using namespace std;
queue<int>line[3];
int waiting[4], cnt[4][100], n, x, total[100];
vector<string>name;
void stand_In_Line(){
    system("cls");
    system("Color 9");
    cout << "HOW MANY PEOPLE WENT TO GIVE VOTE : ";
    int a;
    cin>>a;
    cout << "Which Line They Choose : ";
    int b;
    cin>>b;
    waiting[b-1]+=a;
}
void cast_Vote(){
    system("cls");
    system("Color 1");
    cout<<"Enter The Line Number Of The Voter : ";
    int a;
    cin>>a;
    if(!waiting[a]){
        cout<<"Sorry, the line is empty 🙁 \n";
        return;
    }
    int i=1;
    for(auto x:name) cout<<"To Vote For "<<x<<" Press "<<i++<<"\n";
    int b;
    cin>>b;
    cnt[a][b]++;
    waiting[a]--;
    total[b]++;
}
void display(){
    system("Color 8");
    int i=1;
    for(auto x:name) cout<<"Total Vote For "<<x<<" = "<<total[i]<<"[Line 1:"<<cnt[1][i]<<"; Line 2:"<<cnt[2][i]<<"; Line 3:"<<cnt[3][i++]<<"]\n";
    for(int i=1; i<4; i++) cout<<waiting[i]<<" Voters Are Waiting In Line "<<i<<"\n";
}
void pre(){
    system("Color 12");
    cout<<"Enter Total Number of Contestant: ";
    cin>>n;
    cout<<"Enter Their Names\n";
    for(int i=1; i<=n; i++){
        cout<<i<<"# ";
        string t;
        cin>>t;
        name.push_back(t);
    }
}
int main(){
    if(!x)pre();
    system("Color 5");
    cout << "1. ADD NEW VOTER\n";
    cout << "2. ENTER FOR VOTE\n";
    cout << "3. DISPLAY CURRENT LIST\n";
    cout << "0. EXIT \n";
    cin>> x;
    switch(x){
    case 1:
        stand_In_Line();
        break;
    case 2:
        cast_Vote();
        break;
    case 3:
        display();
        break;
    case 0:
        cout << "THANKS for VOTING\n";
        exit(1);
    default:
        cout << "OPPS! TRY AGAIN!";
        main();
    }
    if(x!=0)main();
}