XO_game [Multi-player]

#include<stdio.h>
#include<conio.h> 
#include<stdlib.h>
void main()
{
	int i,j,k=0,m,n,r;
	char x;
	int a[3][3]={{0,0,0},{0,0,0},{0,0,0}};
	printf("\t\t\t\t1 or 2 GAME:(XO game)\n\t\t\t\t\t-by M.Muhunthan\n---Game is built on 05.09.2019\n\n");
	printf("\t\t\t\t  ----MENU----\n\n\t\t\tEnter the following:\n\n\t\t1 for (0,0)position\n\t\t2 for (0,1)position\n\t\t3 for (0,2)position\n\t\t4 for (1,0)position\n\t\t5 for (1,1)position\n\t\t6 for (1,2)position\n\t\t7 for (2,0)position\n\t\t8 for (2,1)position\n\t\t9 for (2,2)position");
	printf("\n\nThe Given XO format:\n\n");
	for(i=0;i<3;i++)
	{
		for(j=0;j<3;j++)
		{
			printf("%d",a[i][j]);
		}
		printf("\n");
	}
	while(k<9)
	{
		if(k%2==0)
		{
			printf("\nUser1 enter the position number:");
			scanf("%c",&x);
			fflush(stdin);
			r=(int)(x-'0');
			if(!isalpha(x))
			{
				switch(r)
				{
					case 1:
						if(a[0][0]==0)
						{
						a[0][0]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 2:
						if(a[0][1]==0)
						{
						a[0][1]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 3:
						if(a[0][2]==0)
						{
						a[0][2]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 4:
						if(a[1][0]==0)
						{
						a[1][0]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 5:
						if(a[1][1]==0)
						{
						a[1][1]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 6:
						if(a[1][2]==0)
						{
						a[1][2]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 7:
						if(a[2][0]==0)
						{
						a[2][0]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 8:
						if(a[2][1]==0)
						{
						a[2][1]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					case 9:
						if(a[2][2]==0)
						{
						a[2][2]=1;
						k++;
						}
						else
						{
							printf("\nAlready this place filled!!\n\tEnter another input\n");
						}
						break;
					default:
						{
							printf("\nEnter valid input from 1 to 9!\n");
						}
				}
			}
			else
				{
					printf("\nYou entered a character.....Please enter the postion!\n");
				}		
			for(i=0;i<3;i++)
			{
				for(j=0;j<3;j++)
				{
					printf("%d",a[i][j]);
				}
				printf("\n");
			}
			if(a[0][0]==a[0][1]&&a[0][0]==a[0][2]&&a[0][0]!=0&&a[0][1]!=0&&a[0][2]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[0][0]==a[1][0]&&a[0][0]==a[2][0]&&a[0][0]!=0&&a[1][0]!=0&&a[2][0]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[2][0]==a[2][1]&&a[2][0]==a[2][2]&&a[2][0]!=0&&a[2][1]!=0&&a[2][2]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[0][2]==a[1][2]&&a[0][2]==a[2][2]&&a[0][2]!=0&&a[1][2]!=0&&a[2][2]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[0][2]==a[1][1]&&a[0][2]==a[2][0]&&a[0][2]!=0&&a[1][1]!=0&&a[2][0]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[0][0]==a[1][1]&&a[0][0]==a[2][2]&&a[0][0]!=0&&a[1][1]!=0&&a[2][2]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[1][0]==a[1][1]&&a[1][0]==a[1][2]&&a[1][0]!=0&&a[1][1]!=0&&a[1][2]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
			if(a[0][1]==a[1][1]&&a[0][1]==a[2][1]&&a[0][1]!=0&&a[1][1]!=0&&a[2][1]!=0)
			{
				printf("\n\t****User1 is the WINNER!!****\n\n");
				break;
			}
		}
		else
		{
			if(k%2!=0)
			{
				printf("\nUser2 enter the position number:");
				scanf("%c",&x);
				fflush(stdin);
				r=(int)(x-'0');
				if(!isalpha(x))
				{
					switch(r)
					{
						case 1:
							if(a[0][0]==0)
							{
								a[0][0]=2;
								k++;	
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 2:
							if(a[0][1]==0)
							{
							a[0][1]=2;	
							k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 3:
							if(a[0][2]==0)
							{
								a[0][2]=2;
								k++;
							}	
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 4:
							if(a[1][0]==0)
							{
							a[1][0]=2;
							k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 5:
							if(a[1][1]==0)
							{	
								a[1][1]=2;	
								k++;
							}	
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 6:
							if(a[1][2]==0)
							{
								a[1][2]=2;
								k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 7:
							if(a[2][0]==0)
							{
								a[2][0]=2;	
								k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 8:
							if(a[2][1]==0)
							{
								a[2][1]=2;
								k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}
							break;
						case 9:
							if(a[2][2]==0)
							{	
								a[2][2]=2;
								k++;
							}
							else
							{
								printf("\nAlready this place filled!!\n\tEnter another input\n");
							}	
							break;
						default:
							printf("\n\tEnter valid input from 1 to 9!\n");
					}
				}
				else
				{
					printf("\nYou entered a character.....Please enter the postion!\n");
				}
				for(i=0;i<3;i++)
				{
					for(j=0;j<3;j++)
					{
						printf("%d",a[i][j]);
					}
					printf("\n");
				}
				if(a[0][0]==a[0][1]&&a[0][0]==a[0][2]&&a[0][0]!=0&&a[0][1]!=0&&a[0][2]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[0][0]==a[1][0]&&a[0][0]==a[2][0]&&a[0][0]!=0&&a[1][0]!=0&&a[2][0]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[2][0]==a[2][1]&&a[2][0]==a[2][2]&&a[2][0]!=0&&a[2][1]!=0&&a[2][2]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[0][2]==a[1][2]&&a[0][2]==a[2][2]&&a[0][2]!=0&&a[1][2]!=0&&a[2][2]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[0][2]==a[1][1]&&a[0][2]==a[2][0]&&a[0][2]!=0&&a[1][1]!=0&&a[2][0]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[0][0]==a[1][1]&&a[0][0]==a[2][2]&&a[0][0]!=0&&a[1][1]!=0&&a[2][2]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[1][0]==a[1][1]&&a[1][0]==a[1][2]&&a[1][0]!=0&&a[1][1]!=0&&a[1][2]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
				if(a[0][1]==a[1][1]&&a[0][1]==a[2][1]&&a[0][1]!=0&&a[1][1]!=0&&a[2][1]!=0)
				{
					printf("\n\t****User2 is the WINNER!!****\n\n");
					break;
				}
			}
		}	
		if(k>8)
		{
			printf("\n\t****MATCH DRAW****\n\n\n\n");
		}
	}
    getch();		
}