1. /***********************************************
* Author: NAjAM AMjAD BuTT **** **
* Assignment of SIR NUMAN ** ** **
* CONNECT 4 GAME ** ** **
* Source: C++ ** ** **
* creation: 02/FEB/2015 ** ****
************************************************/
#include<iostream.h>
#include <string.h>
void display();
bool check(int a, int b);
int drop(int b, char player);
char place[6][7];//available for whole program
int main()
{
int choice;
do{
cout<<"********************************************
******"<<endl;
cout<<"Press 1 for Play GAME AGAIN "<<endl<<"Press
2 for EXIT GAME"<<endl;
cout<<"********************************************
******n"<<endl;
cout<<"Enter choice for operation of an array = ";
cin>>choice;
switch(choice)
{
case 1:{
int hold;//Will house user row choice
int hold2 = 0;//will hold drop value
int charsPlaced = 0;//Number of peices dropped
so can end game if a draw
bool gamewon = false;//Will be changed to true
when game is won and will exit while loop

2. char player = 15;//start as player 2 will chang
e back 2 player 1
for(int a =0;a <= 5; a++)
{ //fill place with whitespac
e
for(int b = 0; b<=6; b++)
place[a][b] = ' ';
}
display();//Displays for first time so players
can see the board
while(!gamewon){//will stop when game is w
on, ! means NOT makes the oppisite be checked
if(hold2 != -1){//check if there was a erro
r in the last drop
if(player == 15){//if player 2 lasted d
ropped a piece so its player 1s turn
cout<<"player 1 drop where?";
player = 254;//char of players piec
e
}
else{
cout<<"player 2 drop where?";
player = 15;//char of player piece
}
}
while(true){//will run untill 'break;'
if(charsPlaced == 42) break;//if draw
cin>>hold;//get user input
hold--;//take off 1 to account for arra
ys starting at 0 not 1
if(hold <=6 && hold>= 0) break;//if wit
hin valid range stop loop
else cout<< "nplease enter a value be
tween 1 and 7 :";//ask for input and loop again
if (cin.fail()) //catch a non number
{ //
cin.clear(); //Stops cin try
ing to put its value in to hold
char c; //Try entering a n
on number without this, 2 see what this does
cin>>c; //

3. } //Catch a non n
umber
}
if(charsPlaced == 42) break;//if draw
hold2 = drop(hold,player);//drop the player
store the row in hold2
if(hold2 == -1) cout<<"Colomn is fullnPle
ase enter another number between 1 and 7:";//if er
ror -1 row is full
else{
gamewon = check(hold2,hold);//check if
game is run
charsPlaced ++;//another character has
been succesfully placed
system("cls");//This clears the screen wo
rks with windows, not nesscery to run game
display();//displayed updated board
}
}
system("cls");//this clears the screen
if(charsPlaced == 42){//if draw
cout<<"No winner, Game was drawn";
system("pause");
return 0;
}
if(player == 15)//if won by player 2
cout<<"*************GAME WINNER IS : PLAYER
2*************n";
else
cout<<"*************GAME WINNER IS : PLAYER 1**
***********n";
system("pause");//pauses before exit so player
s can see who won, works with windows
//return 0;//Exit application
}break;
case 2: {
cout<<"GAME EXIT "<<endl;
}break;
}}while(choice!=2);

4. }
void display() // DISPLAY FUNCTION
{
cout<<" 1 2 3 4 5 6 7n";
for(int a = 0; a<= 5; a++)
{
for(int b =0; b <= 6; b++) cout<<char(218)<
<char(196)<<char(191)<<" ";
cout<<'n';
for(int b =0; b <= 6; b++) cout<<char(179)<
<place[a][b]<<char(179)<<" ";
cout<<'n';
for(int b =0; b <= 6; b++) cout<<char(192)<
<char(196)<<char(217)<<" ";
cout<<'n';
}
}
bool check(int a, int b)// CHECK FUNCTION
{
int vertical = 1;//(|)
int horizontal = 1;//(-)
int diagonal1 = 1;//()
int diagonal2 = 1;//(/)
char player = place[a][b];
int i;//vertical
int ii;//horizontal
//check for vertical(|)
for(i = a +1;place[i][b] == player && i <= 5;i+
+,vertical++);//Check down
for(i = a -1;place[i][b] == player && i >= 0;i-
-,vertical++);//Check up
if(vertical >= 4)return true;
//check for horizontal(-)
for(ii = b -1;place[a][ii] == player && ii >= 0
;ii--,horizontal++);//Check left
for(ii = b +1;place[a][ii] == player && ii <= 6
;ii++,horizontal++);//Check right
if(horizontal >= 4) return true;
//check for diagonal 1 ()
for(i = a -1, ii= b -1;place[i][ii] == player
&& i>=0 && ii >=0; diagonal1 ++, i --, ii --);//up

5. and left
for(i = a +1, ii = b+1;place[i][ii] == player
&& i<=5 && ii <=6;diagonal1 ++, i ++, ii ++);//dow
n and right
if(diagonal1 >= 4) return true;
//check for diagonal 2(/)
for(i = a -1, ii= b +1;place[i][ii] == player
&& i>=0 && ii <= 6; diagonal2 ++, i --, ii ++);//u
p and right
for(i = a +1, ii= b -1;place[i][ii] == player
&& i<=5 && ii >=0; diagonal2 ++, i ++, ii --);//up
and left
if(diagonal2 >= 4) return true;
return false;
}
int drop(int b, char player)// DROP FUNCTION
{
if(b >=0 && b<= 6)
{
if(place[0][b] == ' '){
int i;
for(i = 0;place[i][b] == ' ';i++)
if(i == 5){place[i][b] = player;
return i;}
i--;
place[i][b] =player;
return i;
}
else{
return -1;
}
}
else{
return -1;
}
}