Screen flickering help

I made this small maze game using an array. The game is pretty dope ,but the problem is the screen flickers everytime the character moves because i am using the system("cls"). Is there any way to make this game withoult the screen flickering all the time ? Here is the code :

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#include <iostream>
#include <conio.h>
#include <windows.h>
#include <chrono>
#include <time.h>
#include <thread>

using namespace std;

void Setcolor(unsigned short color)
{
    HANDLE hcon = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleTextAttribute(hcon,color);
}

char Map[30][40]=
{
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
    {1,2,0,0,0,0,0,0,0,0,0,0,0,3,0,1,0,3,0,0,5,1,0,0,5,0,0,3,0,1,0,0,0,0,3,0,0,0,5,1},
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,1,1,1,1,1,1,1},
    {1,0,0,3,0,0,0,0,5,0,0,0,0,0,0,0,0,0,5,1,5,3,0,0,1,0,0,0,0,3,0,0,0,0,0,0,0,0,5,1},
    {1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1},
    {1,0,1,5,0,0,3,0,0,5,1,5,1,5,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,3,0,0,1},
    {1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1,1,1,0,1,0,1,0,1,1,1,1,1,1,1,1,0,1,0,1,1,1,0,1},
    {1,0,1,1,1,0,1,0,1,0,1,0,1,0,1,5,0,0,1,0,1,0,1,0,1,0,0,0,0,0,3,0,0,0,0,1,5,0,0,1},
    {1,0,3,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
    {1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,0,1,0,3,0,1,0,1,0,0,0,5,0,0,0,0,0,0,3,0,0,0,1},
    {1,0,1,0,0,3,0,5,0,3,0,0,0,0,1,0,1,0,0,5,1,0,1,5,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1},
    {1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,0,1,5,3,0,0,0,0,0,0,3,5,1,0,1},
    {1,0,1,0,1,0,3,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,3,0,0,0,1,1,1,1,1,0,1,1,1,1,1,1,0,1},
    {1,0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,3,0,0,5,1,5,1},
    {1,5,0,0,1,5,1,5,1,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1},
    {1,0,1,5,1,0,0,0,0,0,1,0,1,5,1,0,1,5,1,0,1,5,1,0,1,0,0,0,0,0,3,0,0,0,0,0,3,0,5,1},
    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,4,1,1},
    {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0},
};

void Display()
{
    for (int i=0;i<30;i++)
    {
        for(int j=0;j<40;j++)
        {
            switch(Map[i][j])

            {
            case 0:
                Setcolor(15);
                cout<<" ";
                break;
            case 1:
                Setcolor(15);
                cout<<char(206);
                break;
            case 2:
                Setcolor(3);
                cout<<char(2);
                break;
            case 3:
                Setcolor(12);
                cout<<char(1);
                break;
            case 4:
                Setcolor(15);
                cout<<" ";
                break;
            case 5:
                Setcolor(14);
                cout<<"$";
                break;
            case 6:
                Setcolor(13);
                cout<<"D";
                break;
            case 7:
                Setcolor(3);
                cout<<"-";
                break;
            case 8:
                Setcolor(15);
                cout<<" ";
                break;
            }
        }
        cout<<endl;
    }
}
int main()
{
    char MenuDecision;
    int Lives=3;
    e1:
    Setcolor(6);
    cout<<"Maze warrior\n"<<endl;
    Setcolor(7);
    cout<<"1.Play\n2.Tutorial\n3.Exit"<<endl;
    MenuDecision=_getch();
    if (MenuDecision=='3')
    {
        return 0;
    }
    if (MenuDecision=='2')
    {
        system("cls");
        cout<<"W - Move up"<<endl;
        cout<<"A - Move to the left"<<endl;
        cout<<"D - Move to the right"<<endl;
        cout<<"S - Move down"<<endl;
        cout<<"J - Attack to the left"<<endl;
        cout<<"L - Attack to the right"<<endl;
        Setcolor(12);
        cout<<char(1)<<" - Enemy"<<endl;
        Setcolor(14);
        cout<<"$ - Money"<<endl;
        Setcolor(7);
        cout<<"\nCollect all the money and escape the maze!\n\nPress any key to go back to menu."<<endl;
        char BackToMenu;
        BackToMenu=_getch();
        system("cls");
        goto e1;
    }
    if (MenuDecision=='1')
    {
        bool BowInInventory=false;
        int Cash=0;
        char Action;
        int x=1,y=1;
        system("cls");
        cout<<endl;
        while (1)
        {
            if (Lives==0)
            {
                system("cls");
                Setcolor(12);
                cout<<"GAME OVER"<<endl;
                std::this_thread::sleep_for( std::chrono::seconds(3)) ;
                return 0;
            }
            int LivesIncrement=0;
            system("cls");
        cout<<"Cash :"<<Cash<<endl;
        cout<<"Lives :";
        while (LivesIncrement<Lives)
        {
            Setcolor(12);
            cout<<char(3);
            LivesIncrement++;
        }
        cout<<endl;
            Display();
            Action=_getch();
            if (Action=='a'&& Map[x][y-1]!=1)
            {
                Map[x][y]=0;
                y--;
                if (Map[x][y]==3)
                {
                    Lives--;
                }
                if (Map[x][y]==5)
                {
                    Cash++;
                }
                Map[x][y]=2;
            }
            else if (Action=='d'&& Map[x][y+1]!=1)
            {
                Map[x][y]=0;
                y++;
                if (Map[x][y]==3)
                {
                    Lives--;
                }
                if (Map[x][y]==5)
                {
                    Cash++;
                }
                Map[x][y]=2;
            }
            else if (Action=='w' && Map[x-1][y]!=1)
            {
                Map[x][y]=0;
                x--;
                if (Map[x][y]==3)
                {
                    Lives--;
                }
                if (Map[x][y]==5)
                {
                    Cash++;
                }
                Map[x][y]=2;
            }
            else if (Action=='s' && (Map[x+1][y]!=1 && Map[x+1][y]!=8))
            {
                Map[x][y]=0;
                x++;
                if (Map[x][y]==3)
                {
                    Lives--;
                }
                if (Map[x][y]==5)
                {
                    Cash++;
                }
                if (Map[x][y]==4 && Cash>29)
                {
                    system("cls");
                    Setcolor(2);
                    cout<<"CONGRATULATIONS ! YOU WON !"<<endl;
                    std::this_thread::sleep_for( std::chrono::seconds(3)) ;
                    return 0;
                }
                Map[x][y]=2;
            }
            else if (Action=='j' && (Map[x][y-1]==3 || Map[x][y-1]==0))
            {
                y--;
                Map[x][y]=7;
                system("cls");
                LivesIncrement=0;
        cout<<"Cash :"<<Cash<<endl;
        cout<<"Lives :";
        while (LivesIncrement<Lives)
        {
            Setcolor(12);
            cout<<char(3);
            LivesIncrement++;
        }
        cout<<endl;
                Display();
                std::this_thread::sleep_for( std::chrono::milliseconds(20)) ;
                system("cls");
                Map[x][y]=0;
                y++;
            }
             else if (Action=='l' && (Map[x][y+1]==3 || Map[x][y+1]==0))
            {
                y++;
                Map[x][y]=7;
                system("cls");
                LivesIncrement=0;
        cout<<"Cash :"<<Cash<<endl;
        cout<<"Lives :";
        while (LivesIncrement<Lives)
        {
            Setcolor(12);
            cout<<char(3);
            LivesIncrement++;
        }
        cout<<endl;
                Display();
                std::this_thread::sleep_for( std::chrono::milliseconds(20)) ;
                system("cls");
                Map[x][y]=0;
                y--;
            }
        }
    }

}
Last edited on
Or, don’t cls. Go home and redraw the screen from that.

Find an example with my Gosper Glider Gun toy.
http://www.cplusplus.com/forum/lounge/75168/

Use GoHome() to position the cursor at 0,0, then draw the entire display again.

(My example does a kind of dirty cell update.)

If you must cls, don't use system(). See the example again with the link.

+1 for Thomas1965’s links.
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