Question

我目前正在做一个tic tac toe游戏。我需要制作一个Tic Tac Toe板，每当玩家或计算机移动时更新（显示＆＃34; X＆＃34;以及＆＃34; O＆＃34;。）。到目前为止，我已经成功登上了董事会，但我不知道如何有效地将用户的输入转换为＆＃34; X＆＃34; s。我做的第一件事是像这样的垃圾邮件：

if(playerChoice == 1)
block[0][0] = "X";
if(playerChoice == 2)
block[0][1] = "X";
if(playerChoice == 3)
block[0][2] = "X";
if(playerChoice == 4)
block[1][0] = "X";
if(playerChoice == 5)
block[1][1] = "X";
if(playerChoice == 6)
block[1][2] = "X";
if(playerChoice == 7)
block[2][0] = "X";
if(playerChoice == 8)
block[2][1] = "X";
if(playerChoice == 9)
block[2][2] = "X";

虽然它有效，但它可能是最糟糕的格式。（现在它有效地将玩家的选择放入正确的方格中。）

这里是完整的代码（它没有完成，甚至可能无效。）：

#include <iostream>
#include <ctime>
#include <cstdio>
#include <cstdlib>

using namespace std;

int main()
{
//random starting turn chooser
int turnFirst; //variable to decide whoever goes first
int computerRandomPick; //variable to decide which grid the computer will place "O"
srand(time(0));
turnFirst = rand()% (2 - 1 + 1)+1;//generates starting person.
computerRandomPick = rand()% (9 - 1 + 1)+1;//computer first random pick

//board arrays
string block[3][3];
block [0][0] = {" "};
block [0][1] = {" "};
block [0][2] = {" "};
block [1][0] = {" "};
block [1][1] = {" "};
block [1][2] = {" "};
block [2][0] = {" "};
block [2][1] = {" "};
block [2][2] = {" "};

//player interaction
int playerChoice;

//BEGIN OF PROGRAM
cout << "Welcome to Tic Tac Toe!" <<endl<< endl;


    if(turnFirst == 1)//player first
    {
            cout << "Please choose a grid to place (X): "<<endl<<endl;
                        cout << "       1  |  2  |  3"<< endl;
                        cout << "     -----+-----+-----" << endl;
                        cout << "       4  |  5  |  6" << endl;
                        cout << "     -----+-----+-----" << endl;
                        cout << "       7  |  8  |  9" <<  endl;
                        cout << "     -----+-----+-----" << endl<<endl;
                        cin >> playerChoice;
                        system("CLS");
    }
                if(playerChoice == 1)
                    block[0][0] = "X";
                if(playerChoice == 2)
                    block[0][1] = "X";
                if(playerChoice == 3)
                    block[0][2] = "X";
                if(playerChoice == 4)
                    block[1][0] = "X";
                if(playerChoice == 5)
                    block[1][1] = "X";
                if(playerChoice == 6)
                    block[1][2] = "X";
                if(playerChoice == 7)
                    block[2][0] = "X";
                if(playerChoice == 8)
                    block[2][1] = "X";
                if(playerChoice == 9)
                    block[2][2] = "X";



    if(turnFirst == 2)//computer first
    {
            system("CLS");
            cout << "The computer picked: " <<endl<<endl;
    }
                        if(computerRandomPick == 1)
            block[0][0] = "O";
            if(computerRandomPick == 2)
            block[0][1] = "O";
            if(computerRandomPick == 3)
            block[0][2] = "O";
            if(computerRandomPick == 4)
            block[1][0] = "O";
            if(computerRandomPick == 5)
            block[1][1] = "O";
            if(computerRandomPick == 6)
            block[1][2] = "O";
            if(computerRandomPick == 7)
            block[2][0] = "O";
            if(computerRandomPick == 8)
            block[2][1] = "O";
            if(computerRandomPick == 9)
            block[2][2] = "O";



//Game Board.


                        cout << "       " << block[0][0] << "  |  " << block [0][1] << "  |  " << block [0][2] << endl;
                        cout << "     -----+-----+-----" << endl;
                        cout << "       " << block [1][0] << "  |  " << block [1][1] << "  |  " << block [1][2] << endl;
                        cout << "     -----+-----+-----" << endl;
                        cout << "       " << block [2][0] << "  |  " << block [2][1] << "  |  " << block [2][2] << endl;
                        cout << "     -----+-----+-----" << endl;
    return 0;
}

Answer 1

假设块[3] [3]声明为：

char block[3][3];

playerChoice可能是1-9。因此，您可以优化为：

playerChoice --; // to make it 0-8
block[playerChoice / 3][playerChoice %3] = 'X'; // instead of "X"

Answer 2

这是一个想法：您可以使用网格的常规结构来简化问题。

如果playerChoice在1到3之间，则第一个索引为0.如果它在4到6之间，则索引为1，如果它在7到9之间，则索引为1是2.这将输入细分为3组，每组3个。事实上，索引是(playerChoice - 1)/3，具有整数除法。

第二个索引每3个选项重复一次。这意味着使用模数可以帮助到这里。实际上，索引是(playerChoice - 1) % 3。

您可以将整个代码缩减为

block[(playerChoice-1)/3][(playerChoice-1)%3] = "X";

或某些变化。

C ++：如何将用户输入并将其放入Tic Tac Toe板

2 个答案: