xo.go

package main 

import "fmt"


func main (){
	
	// init the game board with empty strings

	xoBoard := [3][3]string{}

	// var to carry the current player name 
	player := "x"
     
    for {



		fmt.Println("player", player);

		// read row value
	
		var row int 
		 fmt.Println("please enter number o,1 or 2")
		 fmt.Scanln(&row)
	
		if row < 0 || row >2 {
			fmt.Println("invalid entry, please enter new num, 0,1 or 2")
		    continue
		}

	    // read column value
		var column int 
		fmt.Println("please enter number o,1 or 2")
		fmt.Scanln(&column)
   
	   if column < 0 || column >2 {
		   fmt.Println("invalid entry, please enter new num, 0,1 or 2")
		   continue
	   }

       // set value into game board
	   if xoBoard[row][column] == "" {
		   xoBoard[row][column] = player
	   } else {
		   // index already have value
		   fmt.Println("invalid entry :", row, column, "value", xoBoard[row][column])
		   continue
	   }

	   // display the game board after each move
	   fmt.Println(xoBoard[0])
	   fmt.Println(xoBoard[1])
	   fmt.Println(xoBoard[2])

	   // did some one win
	   for i := 0; i < 3 ; i++{
		   // check row || columns
		   if(xoBoard[i][0]==xoBoard[i][1]&&xoBoard[i][1]==xoBoard[i][2]&&xoBoard[i][2]==player || xoBoard[0][i]==xoBoard[1][i]&&xoBoard[1][i]==xoBoard[2][i]&&xoBoard[2][i]==player ){
				fmt.Println("game ended , winner is player:", player)
				// 
				return
			}
	   }


	   if(xoBoard[0][0] == xoBoard[1][1]&&xoBoard[1][1] == xoBoard[2][2] && xoBoard[2][2] == player || xoBoard[0][2] == xoBoard[1][1] && xoBoard[1][1] == xoBoard[2][0] && xoBoard[2][0] == player) {
		fmt.Println("game ended , winner is player:", player)
		// 
		return
		}





	   // swap players 
	    if player == "x" {
			player = "o"
		} else {
			player = "x"
		}


	}

 }