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TERM Environment Variable error?

Tiancinnati1 (5)
Hi guys,

So I have been working on a Game of Life code the past few days and I have come to something that I am hoping will work. I tried to run it and I am getting an error that says "TERM Environment Variable not set". Here is my code...

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#include <iostream>
#include <vector>
#include <unistd.h>
#include <cstdlib>
using namespace std;

// Global variables

const int ROWS=21;
const int COLS=80;
const char ALIVE= 'x';
const char DEAD= ' ';

// Function prototypes 
void generation(vector< vector<char> > &world, vector< vector<char> > &worldcopy);

void display(vector< vector<char> > &world);

bool board(int i, int j);

int main()
{
    vector< vector<char> > world(ROWS, vector<char>(COLS, DEAD));
    vector< vector<char> > worldcopy(ROWS, vector<char>(COLS, DEAD));
    
    // Set the initial alive cell configuration
    
    world[10][5] = world [10][4] = world[9][5] = ALIVE;
    
    while(true)
    {
        system("clear");
        display(world);
        usleep(80000);
        generation(world, worldcopy);
        
        return 0;
    }
    

}


void generation(vector< vector<char> > &world, vector< vector<char> > &worldcopy)
{
    int count=0;
    
    for (int i=0; i<ROWS; i++)
    {
        for (int j=0; j<COLS; j++)
        {
            // Check neighbor cells for life
            if (board(i-1,j+1))
            {
             if (worldcopy[i-1][j+1]==ALIVE)
              {
                count++;
              }
            }
            
            if (board(i,j+1))
            {    
             if (worldcopy[i][j+1]==ALIVE)
              { 
                count++;
              }
            }
            
            if (board(i+1,j+1))
            {
             if (worldcopy[i+1][j+1]==ALIVE)
              {
                count++;
              }
            }
            
            if (board(i-1,j))
            {
             if (worldcopy[i-1][j]==ALIVE)
              {
                count++;
              }
            }
            
            if (board(i+1,j))
            {
             if (worldcopy[i+1][j]==ALIVE)
              {
                count++;
              }
            }
            if (board(i-1,j-1))
            {
             if (worldcopy[i-1][j-1]==ALIVE)
              {
                count++;
              }
            }
            if (board(i,j-1))
            {
             if (worldcopy[i][j-1]==ALIVE)
              {
                count++;
              }
            }
            
            if (board(i+1,j-1))
            {
             if (worldcopy[i+1][j-1]==ALIVE)
              {
                count++;
              }
            }
            
            // Rules
            // Lonliness
            if ((worldcopy[i][j]==ALIVE) && (count==0 || count ==1))
            {
                world[i][j] = worldcopy[i][j];
                world[i][j] = DEAD;
            }
            // Lives to next gen.
            else if ((worldcopy[i][j]==ALIVE) && (count==2 || count==3))
            {
                world[i][j] = worldcopy[i][j];
                world[i][j] = ALIVE;
            }
            // Death by overcrowding
            else if (worldcopy[i][j]==ALIVE && count >3)
            {
                world[i][j] = worldcopy[i][j];
                world[i][j] = DEAD;
            }
            // Birth
            else if(worldcopy[i][j]==ALIVE && count==3)
            {
                world[i][j] = worldcopy[i][j];
                world[i][j] = ALIVE;
            }
        }
    }
}

void display(vector< vector<char> > &world)
{
    
    for (int i=0; i <ROWS; i++)
    {
        for (int j=0; j<COLS; j++)
        {
            cout << world[i][j];
        }
        cout << endl;
    }
}

bool board(int i, int j)
{
    if (i<0 || i>=ROWS)
    {
        return false;
    }
    if (j<0 || j>=COLS)
    {
        return false;
    }
    else
    {
        return true;
    }
}


Can anyone help me identify/fix my problem?
Vidminas (241)
I guess that this is your problem:
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while(true)
{
    system("clear");
    display(world);
    usleep(80000);
    generation(world, worldcopy);
        
    return 0;
}

1. Put return 0; outside of this loop
2. Don't keep a loop that runs for ever, make a variable like bool exit_game (false); and loop while ( !exit_game )
Tiancinnati1 (5)
Ok, so the return was just a simple mistake (thanks for catching it). But even after those fixes it still keeps giving me that weird error every time it prints a new output. And also the outputs aren't changing like they are supposed to. Anything else obvious?
Vidminas (241)
http://stackoverflow.com/questions/8470184/what-does-term-environment-variable-not-set-mean
Try googling "TERM Environment Variable not set"
There are a lot of results.
Your terminal configuration must be messed up.
Tiancinnati1 (5)
Ok thanks, I am just very new to programming and I am far from a computer wiz so some of that stuff doesn't make much sense to me. Thats the only reason I was posting on here.
Vidminas (241)
This should be a linux question.
What distribution are you on?

One temporary solution is to simply avoid using system ("clear");
Read this article: http://www.cplusplus.com/forum/articles/10515/

Avoid using system (anything);
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