how to change value of array with displaying it multiple time

[SiAR92yv]

Hey guys, so i am a beginner with c++ and i am trying to write a code that will help me move a person which is in this case 'X' in an array of 10x10 ... so this is my code. The problem i am facing is that i need to keep my array 10x10 displayed and start updating it with the position of the 'X' ... When i enter 'z' for example it needs to move up ... i tried to change it by position only but it didn t work . i am trying it for 'z' now only .
Thanks a lot and excuse my bad english .

#include<iostream>
#include<stdlib.h>
#include<time.h>
#include<iomanip>

using namespace std;

void remplir_tableau(char tab[10][10])
{
	for (int i=0;i<=9;i++)
	{
		for (int j=0;j<=9;j++)
		{
			tab[i][j]='-';
		}
	}
}

void afficher_tableau(char tab[10][10],int x, int y){
	tab[x][y]='X';
	for(int i=0;i<=9;i++){
		for(int j=0;j<=9;j++){
			cout<<tab[i][j]<<" ";
		}
		cout<<endl;
	}
	}
}

int main()
{
	int x=5,y=5,n=1;
	char tab[10][10];
	char deplacer;
	remplir_tableau(tab);
	afficher_tableau(tab,x,y,n);
	cin>>deplacer;
	switch(deplacer){
		case 'z':
			x=x-1;
			y=y;
			afficher_tableau(tab,x,y);
		break;
		case 'q':
			x=x;
			y=y-1;
		break;
		case 's':
			x=x+1;
			y=y;
		break;
		case 'd':
			x=x;
			y=y+1;
		break;
		default: cout<<"Vous devez entrer : z q s d !!"<<endl;
	}
	
}

[Ganado]

Your program doesn't compile.

As far as logic goes, one problem is that you do
tab[x][y]='X';
But you never reset that back to '-'.

You can do something like this:

#include<iostream>
#include<stdlib.h>
#include<time.h>
#include<iomanip>

using namespace std;

void remplir_tableau(char tab[10][10])
{
	for (int i=0;i<=9;i++)
	{
		for (int j=0;j<=9;j++)
		{
			tab[i][j]='-';
		}
	}
}

void afficher_tableau(char tab[10][10],int x, int y){
	tab[x][y]='X';
	for(int i=0;i<=9;i++){
		for(int j=0;j<=9;j++){
			cout<<tab[i][j]<<" ";
		}
		cout<<endl;
	}
}

int main()
{
	int x=5,y=5;
	char tab[10][10];
	char deplacer;
	remplir_tableau(tab);
	afficher_tableau(tab,x,y);
	
	while (true)
	{
		cin>>deplacer;
		switch(deplacer){
		case 'z':
			tab[x][y] = '-';
    			x=x-1;
    			y=y;
			afficher_tableau(tab,x,y);
			break;
		case 'q':
			tab[x][y] = '-';
    			x=x;
    			y=y-1;
    			afficher_tableau(tab,x,y);
    		break;
    		case 's':
    			tab[x][y] = '-';
    			x=x+1;
    			y=y;
 			afficher_tableau(tab,x,y);
			break;
		case 'd':
			tab[x][y] = '-';
			x=x;
			y=y+1;
			afficher_tableau(tab,x,y);
			break;
    		default:
			cout<<"Vous devez entrer : z q s d !!"<<endl;
			break;
		}
	}
	

	
}

[SiAR92yv]

Thanks a lot @Ganado .
The code is working fine right now ... i am looking for a function or a way to change the position at the same array too ... i mean changing position of 'X' without displaying the array multiple times.

[Ganado]

Under normal circumstances, you have to write it multiple times. That's the nature of console output. There could be some OS-specific way to write to specific blocks on the screen, but I do not know of such ways.

What I would do is just clear your screen between each render, please see this article: http://www.cplusplus.com/articles/4z18T05o/
"Clear the screen"

If you're on Windows, see:
http://www.cplusplus.com/articles/4z18T05o/#Windows

[SiAR92yv]

Yes i tried to use before system("CLS") and it clears the windows but it just seems i don t really know where to put it or how to use it.

[SiAR92yv]

and it works fine right now . i have put the system("PAUSE") in the beggining of the function . thanks a lot @Ganado

[lastchance]

This might work under windows.

#include<iostream>
#include<windows.h>

const int N = 10;

using namespace std;

//======================================

void gotoxy( int x, int y )
{
   static HANDLE h = GetStdHandle( STD_OUTPUT_HANDLE );
   COORD c = { x, y };
   SetConsoleCursorPosition( h, c );
}

//======================================

void fill_table( char tab[N][N], char c )
{
   for ( int i = 0; i < N; i++ )
   {
       for ( int j = 0; j < N; j++ ) tab[i][j] = c;
   }
}

//======================================

void draw_table( char tab[N][N] )
{
   for ( int i = 0; i < N; i++ )
   {
      for ( int j = 0; j < N; j++ )
      {
         gotoxy( i, j );
         cout << tab[i][j];
      }
   }
}

//======================================

void update_table( int xold, int yold, char cdefault, int x, int y, char c )
{
   gotoxy( xold, yold  );   cout << cdefault;
   gotoxy( x   , y     );   cout << c;
   gotoxy( 0   , N + 1 );   cout << "Enter u, d, l, r: ";
}

//======================================

int main()
{
   char cdefault = '-';
   char c        = 'X';
   char tab[N][N];

   fill_table( tab, cdefault );
   draw_table( tab );

   int x = 5, y = 5;
   update_table( x, y, cdefault, x, y, c );

   char direction;
   while ( true )
   {
      int xold = x, yold = y;

      cin >> direction;

      switch( direction )
      {
         case 'u':   if ( y != 0     ) y--;   break;
         case 'd':   if ( y != N - 1 ) y++;   break;
         case 'l':   if ( x != 0     ) x--;   break;
         case 'r':   if ( x != N - 1 ) x++;   break;
      }
      update_table( xold, yold, cdefault, x, y, c );
   }
}