错误说类定义为public是私有的 [英] error saying class defined as public is private
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问题描述
使用类继承制作3D Tic Tac Toe游戏。编译器错误如下。
行：
43 [Error]'void CPUClass :: cpu是私人的
190
$ b 查看我的代码，我已经清楚地定义了cpu （）作为public。任何想法我可以忽略什么？
#include< iostream>
#include< time.h> // seeding random
#include< windows.h>
using namespace std;
class TTT {
public：
void setup（）;
void display（）;
void cpu（）;
void player（）;
void check（int）;
protected：
int cp; // comp points
int pp; // player points
char board [9]; // board
char board2 [9];
char board3 [9];
char xo [2];
int rn; //随机的第一个
int won; //检查win或stalemate
int turn; //跟踪当前玩家
int rc; //随机comp移动
int full; //看板是否已满
int b1f;
int b2f;
int b3f;
};
class CPUClass：public TTT {
void cpu（）;
};
int main（int argc，char * argv []）
{
TTT ttt;
cout<< 新奇的3D TicTacToe！ << endl;
cout<< ~~玩起来好像所有三个板被堆叠成一个立方体，同样的规则适用〜<< endl;
ttt.setup（）;
}
void TTT :: setup（）{//设置游戏空间
won = 0; // game not won
full = 0; // board is full at 9
cp = 0;
pp = 0;
b1f = 0;
b2f = 0;
b3f = 0;
//三个板：
board [0] ='1';
board [1] ='2';
board [2] ='3';
board [3] ='4';
board [4] ='5';
board [5] ='6';
board [6] ='7';
board [7] ='8';
board [8] ='9';
board2 [0] ='1';
board2 [1] ='2';
board2 [2] ='3';
board2 [3] ='4';
board2 [4] ='5';
board2 [5] ='6';
board2 [6] ='7';
board2 [7] ='8';
board2 [8] ='9';
board3 [0] ='1';
board3 [1] ='2';
board3 [2] ='3'
board3 [3] ='4';
board3 [4] ='5';
board3 [5] ='6';
board3 [6] ='7';
board3 [7] ='8';
board3 [8] ='9';
srand（time（NULL））;
rn =（rand（）％2）;
if（rn == 0）{
turn = 0; // comp go first
xo [0] ='x'; // comp = x
xo [1] ='o'; // human = o
cout<< \\\
You are'O'<< endl;
} else {
turn = 1; // player goes first
xo [0] ='o'; // comp = o
xo [1] ='x'; // human = x
cout<< \\\
You are'X'<< endl;
}
display（）; //发送这个信息到显示函数
}
void TTT :: display（）{/ ******你在2:10离开了这里修改**** ** /
cout<< < endl;
for（int i = 0; i <9; i ++）
{
if（（i + 1）％3 == 0）
{
cout<<板[i] endl;
}
else
{
cout<板[i] |;
}
}
cout<< < endl;
cout<< \t;
for（int i = 0; i <9; i ++）
{
if（（i + 1）％3 == 0）
{
cout<< board2 [i]<< endl;
cout<< \t;
}
else
{
cout< board2 [i]<< |;
}
}
cout<< < endl;
cout<< \t\t;
for（int i = 0; i <9; i ++）
{
if（（i + 1）％3 == 0）
{
cout<< board3 [i]<< endl;
cout<< \t\t;
}
else
{
cout< board3 [i]<< |;
}
}
cout< < endl;
CPUClass cc;
if（full == 27）{//如果板子满了
check（won）; //检查游戏是否赢得或绑定
}
else {
if（turn％2 == 0）{
player（）;
} else {
cc.cpu（）;
}
}
}
void TTT :: player（）{
int w;
int p;
while（won！= 1）//如果没有人赢过
{
cout< 做你的动作：选择一个层[top = 1 middle = 2 bottom = 3]< endl;
cin>> p;
if（p == 1）{
cout< 做你的举动：选择一个空间<< endl;
cin>> w;
if（（board [w-1] =='x'）||（board [w-1] =='o'））{//检查是否开放
cout<< \\\
Space occupied，Invalid move \\\
;
player（）;
} else {
board [w-1] = xo [1]; //绘制当前玩家移动
turn ++;
full ++;
b1f ++;
display（）; // go to display
}
}
else if（p == 2）{
cout< 做你的举动：选择一个空间<< endl;
cin>> w;
if（（board2 [w-1] =='x'）||（board2 [w-1] =='o'））{//检查是否开放
cout<< \\\
Space occupied，Invalid move \\\
;
player（）;
} else {
board2 [w-1] = xo [1];
turn ++;
full ++;
b2f ++;
display（）;
}
}
else if（p == 3）{
cout< 做你的举动：选择一个空间<< endl;
cin>> w;
if（（board3 [w-1] =='x'）||（board3 [w-1] =='o'））{//检查是否开放
cout<< \\\
Space occupied，Invalid move \\\
;
player（）;
} else {
board3 [w-1] = xo [1];
turn ++;
full ++;
b3f;
display（）;
}
}
else {
cout<<请选择一个选项！\\\
\\\
;
player（）;
}
}
}
void TTT :: cpu（）{
srand （空值））; // seed with clock
rc =（rand（）％9）;
int bc;
if（b1f == 9）{//如果一个电路板被填满了一个opthers
bc = 1+（rand（）％2）;
}
else if（b3f == 9）{
bc =（rand（）％2）;
}
else if（b2f == 9）{
bc =（rand（）％2）;
if（bc == 1）{
bc = 2;
}
}
else {
bc =（rand（）％3）; //如果没有满，随机选择一个
}
if（bc == 0）{
if（（board [rc] =='x' ）||（board [rc] =='o'））{
cpu（）; //循环并找到一个新位置
} else {
turn ++;
full ++;
b1f ++;
board [rc] = xo [0];
display（）;
}
}
else if（bc == 1）{
if（（board2 [rc] =='x '）||（board2 [rc] =='o'））{
cpu（）; //循环并找到一个新位置
} else {
turn ++;
full ++;
b1f ++;
board [rc] = xo [0];
display（）;
}
}
else if（bc == 2）{
if（（board3 [rc] =='x '）||（board3 [rc] =='o'））{
cpu（）; //循环并找到一个新位置
} else {
turn ++;
full ++;
b1f ++;
board [rc] = xo [0]
display（）;
}
}
}
void TTT :: check（int wo）// check wins
{
// horizontal win
if（（board [0] =='x'）&&（board [1] =='x'）&&
$ b if（rn == 0）{
cp ++;
} else {
pp ++;
}
}
if（（board [6] =='x'）&& 'x'）&&&（board3 [2] =='x'））{
if（rn == 0）{
cp ++;
} else {
pp ++;
}
}
wo = 1;
cout<< \\\
Game Over！\\\
;
cout<< \\\
Score：Player - << pp<<Computer - << cp<<\\\
;
if（pp == cp）{// if points are =
cout<< STALEMATE\\\
;
}
else if（pp> cp）{
cout< YOU WIN\\\
;
}
else if（pp< cp）{
cout< 计算机wins\\\
;
}
int c;
cout<<\\\
Play again？[1] for yes other else to exit\\\
;
cin>> C;
if（c == 1）{//如果用户进入1，重置游戏
setup（）;
}
else {
exit（0）;
}
}
解决方案
默认情况下，类访问是私有的。如果要通过 CPUClass 对象调用 CPUClass :: cpu（）函数，则需要使 cpu（） public：
class CPUClass：public TTT {
public ：//<< ----- make below functions public
void cpu（）;
};
Making a 3D Tic Tac Toe game using class inheritance. Compiler error as follows.
line:
43 [Error] 'void CPUClass::cpu()' is private
190 [Error] within this context
Looking at my code, I've clearly defined cpu() as public. Any ideas what I'm overlooking?
#include <iostream>
#include <time.h> //seeding random
#include <windows.h>
using namespace std;
class TTT {
public:
void setup();
void display();
void cpu();
void player();
void check(int);
protected:
int cp; //comp points
int pp; //player points
char board[9]; //board
char board2[9];
char board3[9];
char xo[2];
int rn; //random who goes first
int won;//checks for win or stalemate
int turn;//keeps track of current player
int rc;//random comp move
int full;//see if board is full
int b1f;
int b2f;
int b3f;
};
class CPUClass : public TTT{
void cpu();
};
int main(int argc, char *argv[])
{
TTT ttt;
cout << "Newfangled 3D TicTacToe!" << endl;
cout << "~~play as though all three boards are stacked as a cube. Same rules apply.~~" << endl;
ttt.setup();
}
void TTT::setup(){ //sets up gamespace
won = 0; //game not won
full = 0; //board is full at 9
cp = 0;
pp =0;
b1f = 0;
b2f = 0;
b3f=0;
//the three boards:
board[0] = '1';
board[1] = '2';
board[2] = '3';
board[3] = '4';
board[4] = '5';
board[5] = '6';
board[6] = '7';
board[7] = '8';
board[8] = '9';
board2[0] = '1';
board2[1] = '2';
board2[2] = '3';
board2[3] = '4';
board2[4] = '5';
board2[5] = '6';
board2[6] = '7';
board2[7] = '8';
board2[8] = '9';
board3[0] = '1';
board3[1] = '2';
board3[2] = '3';
board3[3] = '4';
board3[4] = '5';
board3[5] = '6';
board3[6] = '7';
board3[7] = '8';
board3[8] = '9';
srand(time(NULL));
rn = (rand() %2);
if (rn == 0){
turn = 0; // comp goes first
xo[0] = 'x'; //comp = x
xo[1] = 'o'; //human = o
cout << "\nYou are 'O'" << endl;
}else{
turn = 1; //player goes first
xo[0] = 'o'; //comp = o
xo[1] = 'x'; // human = x
cout << "\nYou are 'X'" << endl;
}
display(); //send this info to display function
}
void TTT::display(){/******you left off revising right here at 2:10******/
cout << "" << endl;
for (int i = 0; i < 9; i++)
{
if ( (i+1) % 3 == 0 )
{
cout << board[i] << endl;
}
else
{
cout << board[i] << " | ";
}
}
cout << "" << endl;
cout << "\t";
for (int i = 0; i < 9; i++)
{
if ( (i+1) % 3 == 0 )
{
cout << board2[i] << endl;
cout << "\t";
}
else
{
cout << board2[i] << " | ";
}
}
cout << "" << endl;
cout << "\t\t";
for (int i = 0; i < 9; i++)
{
if ( (i+1) % 3 == 0 )
{
cout << board3[i] << endl;
cout << "\t\t";
}
else
{
cout << board3[i] << " | ";
}
}
cout << "" << endl;
CPUClass cc;
if (full == 27){ //if board is full
check(won); //check if game has been won or tiedtied
}
else{
if (turn%2 == 0){
player();
}else{
cc.cpu();
}
}
}
void TTT::player(){
int w;
int p;
while (won != 1) //if no one has won
{
cout << "Make your move: Choose a layer [top=1 middle=2 bottom=3]" << endl;
cin>> p;
if (p == 1){
cout << "Make your move: Choose a space" << endl;
cin>>w;
if ((board[w-1] == 'x') || (board[w-1] == 'o')){ //checks if spot is open
cout << "\nSpace occupied, Invalid move\n";
player();
}else{
board[w-1] = xo[1];//draws current players move
turn ++;
full ++;
b1f++;
display(); //go to display
}
}
else if (p == 2){
cout << "Make your move: Choose a space" << endl;
cin>>w;
if ((board2[w-1] == 'x') || (board2[w-1] == 'o')){ //checks if spot is open
cout << "\nSpace occupied, Invalid move\n";
player();
}else{
board2[w-1] = xo[1];
turn ++;
full ++;
b2f++;
display();
}
}
else if (p == 3){
cout << "Make your move: Choose a space" << endl;
cin>>w;
if ((board3[w-1] == 'x') || (board3[w-1] == 'o')){ //checks if spot is open
cout << "\nSpace occupied, Invalid move\n";
player();
}else{
board3[w-1] = xo[1];
turn ++;
full ++;
b3f;
display();
}
}
else{
cout <<"Please select one of the options!\n\n" ;
player();
}
}
}
void TTT::cpu(){
srand(time(NULL)); //seeds with clock
rc = (rand() %9);
int bc;
if (b1f == 9){ //if a board is filled go one of the opthers
bc = 1+(rand() %2);
}
else if (b3f == 9){
bc = (rand() %2);
}
else if (b2f == 9){
bc = (rand() %2);
if (bc == 1){
bc = 2;
}
}
else {
bc = (rand() %3); //randomly pick one if none are full
}
if (bc == 0){
if ((board[rc] == 'x' ) || ( board[rc] == 'o')){
cpu(); //loops and finds a new spot
}else{
turn++;
full ++;
b1f++;
board[rc] = xo[0];
display();
}
}
else if (bc == 1){
if ((board2[rc] == 'x' ) || ( board2[rc] == 'o')){
cpu(); //loops and finds a new spot
}else{
turn++;
full ++;
b1f++;
board[rc] = xo[0];
display();
}
}
else if (bc == 2){
if ((board3[rc] == 'x' ) || ( board3[rc] == 'o')){
cpu(); //loops and finds a new spot
}else{
turn++;
full ++;
b1f++;
board[rc] = xo[0];
display();
}
}
}
void TTT::check(int wo)// check wins
{
//horizontal win
if ((board[0] == 'x') && (board[1] == 'x') && (board[2] == 'x')){
if (rn == 0){
cp++;
}else{
pp++;
}
}
if ((board[6] == 'x') && (board2[4] == 'x') && (board3[2] == 'x')){
if (rn == 0){
cp++;
}else{
pp++;
}
}
wo =1;
cout << "\nGame Over!\n" ;
cout << "\nScore: Player - "<<pp<<" Computer - "<<cp<<"\n" ;
if (pp == cp){ //if points are =
cout << "STALEMATE\n" ;
}
else if (pp > cp){
cout << "YOU WIN\n" ;
}
else if (pp < cp){
cout << "The computer wins\n" ;
}
int c;
cout<<"\nPlay again? [1] for yes anything else to exit\n" ;
cin >> c;
if (c == 1){ //if user enters 1, reset the game
setup();
}
else{
exit(0);
}
}
解决方案
By default, class access is private. If you want to call CPUClass::cpu() function through a CPUClass object, you need to make cpu() public:
class CPUClass : public TTT{
public: //<<----- make below functions public
void cpu();
};
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