为什么 Player.x 和 Player.y 变量没有改变？

编辑#2：好的，我做了另一个*.cpp来检查箭头键的代码是否正确。这样做时，我注意到detectKeyPressing()中的keyPressed变量有错误的变量类型，所以我将其从char更改为int，并更改了代码。

一旦我做到了，它就奏效了。现在我已经设置了限制，所以Player不能超出广场。但我还有一个问题，动作太难了，如果你按得太快，指令就会出现令人讨厌的延迟。我知道我应该使用Sleep(ms)或Delay(ms)，但我不知道什么时候应该使用

这是新代码：

#include <iostream>
#include <cmath>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <Windows.h>
using namespace std;
int detectKeyPressing() {
// 0: Escape
// 1: Enter
//2: Up
// 3: Left
// 4: Down
// 5: Right
int keyPressed = 0;
while (keyPressed != 27) {
if (keyPressed == 0 || keyPressed == 224) {
keyPressed = _getch(); //First value of _getch() when any of the arrow keys are pressed is "224", the next one is the code depending of which arrow you pressed
}
else if (keyPressed == 13) {
return 1;
}
else {
switch (keyPressed) {
//Up
case 72:
return 2;
break;
//Left
case 75:
return 3;
break;
//Down
case 80:
return 4;
break;
//Right
case 77:
return 5;
break;
//Default
default:
return -1;
break;
}
}
};
return 0;
};

int mainMenu() {
int enterPressed = 0;
cout << "Press Enter to Begin, or ESC to exit" << endl;
enterPressed = detectKeyPressing();
system("cls");
return enterPressed;
};
void draw(int playerX, int playerY) {
//Player coordinates, made for testing
cout << "Player.x = " << playerX << endl << "Player.y = " << playerY << endl;
//The next 8 spaces go blank
for (int i = 1; i < 8; i++) {
cout << endl;
}
//Square Limit Making
//Top Limit
for (int iw = 1; iw < 80; iw++) {
cout << "-";
}
cout << endl;
//Border limits and inside the Square
for (int ih = 1; ih < 30; ih++) {
//Left border
cout << "|";
//Inside the Square
for (int iw = 1; iw < 78; iw++) {
if (iw == playerX && ih == playerY) {
cout << "a"; //This is supposed to be ♥ but I don't know how to put it in the screen with a cout
}
else {
cout << " ";
}
}
//Right border
cout << "|" << endl;
}
//Bottom limit  
for (int iw = 1; iw < 80; iw++) {
cout << "-";
}
}
int main() {
//Hide cursor
HANDLE hCon;
hCon = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1;
cci.bVisible = FALSE;
SetConsoleCursorInfo(hCon, &cci);
//Variable Making
int gameStarted = -1; // 1 if game is running, 0 if not
//int t = 0; //Turn Counter, not useful for now
Sleep(200); //Wait to get a new seed
srand(time(NULL)); //Seed for rand()
//Menu Loop, remember, 1 if game starts running, 0 if you exit
while (gameStarted > 1 || gameStarted < 0) {
gameStarted = mainMenu();
}
//Like Void Start() in Unity
if (gameStarted == 1) {
int pressedKey = -1; //Creating pressedKey at Start
class Player {
public:
int life = 20;
int accuracy = 80 + (rand() % 100) / 20;
int damage = 5 + (accuracy / 10) + (rand() % 100) / 50;
bool isAlive = true;
int x = 39;
int y = 24;
int speed = 1;
};
class Enemy {
public:
int life = 100;
int satisfaction = 0;
bool isAlive = true;
bool isSatisfied = false;
int damage = 2 + (rand() % 100) / 20;
};
Player Player;
Enemy Enemy;
draw(Player.x, Player.y);
//Like Void Update() in Unity
while (gameStarted != 0) {
pressedKey = detectKeyPressing(); // Save detectKeyPressing()'s return in pressedKey
//Draw if proyectile is moving - not yet
//Draw if player is moving (pay attention specially to this part)
if (pressedKey == 0) {
gameStarted = 0; //if ESC is pressed, exit the loop and exits
}
//If any of the Arrow Keys are pressed
else if (pressedKey > 1 && pressedKey < 6) {
switch (pressedKey) {
//Up
case 2:
Sleep(200);
if (Player.y == Player.speed) {
Player.y = Player.speed; //Top Limit
}
else {
Player.y -= Player.speed;
}
break;
//Left
case 3:
Sleep(200);
if (Player.x == Player.speed) {
Player.x = Player.speed; //Left Limit
}
else {
Player.x -= Player.speed;
}
break;
//Down
case 4:
Sleep(200);
if (Player.y == 30 - Player.speed) {
Player.y = 30 - Player.speed; //Bottom Limit
}
else {
Player.y += Player.speed;
}
break;
//Right
case 5:
Sleep(200);
if (Player.x == 78 - Player.speed) {
Player.x = 78 - Player.speed; //Right Limit
}
else {
Player.x += Player.speed;
}
break;
};
system("cls"); //Erase all
draw(Player.x, Player.y); //Redraw everything, with Player.x or Player.y modified
};
};
};
return 0;
};

编辑#1：我纠正了你告诉我的错误，这里是修改的主要功能。但它不起作用。

int main(){
//Hide cursor
HANDLE hCon;
hCon = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 50;
cci.bVisible = FALSE; //Changed "TRUE" to "FALSE"
SetConsoleCursorInfo(hCon, &cci);
//Variable Making
int gameStarted = -1; // 1 if game is running, 0 if not
//int t = 0; //Turn Counter, not useful for now
Sleep(200); //Wait to get a new seed
srand(time(NULL)); //Seed for rand()
//Menu Loop, remember, 1 if game starts running, 0 if you exit
while (gameStarted > 1 || gameStarted < 0) {
gameStarted = mainMenu();
}
//Like Void Start() in Unity
if (gameStarted == 1) {
int pressedKey = -1; //Creating pressedKey at Start
class Player {
public:
int life = 20;
int accuracy = 80 + (rand() % 100) / 20;
int damage = 5 + (accuracy / 10) + (rand() % 100) / 50;
bool isAlive = true;
int x = 39;
int y = 24;
int speed = 2;
};
class Enemy {
public:
int life = 100;
int satisfaction = 0;
bool isAlive = true;
bool isSatisfied = false;
int damage = 2 + (rand() % 100) / 20;
};
Player Player;
Enemy Enemy;
draw(Player.x, Player.y);
//Like Void Update() in Unity
while (gameStarted != 0) {
pressedKey = detectKeyPressing(); //Save detectKeyPressing()'s return in pressedKey
//Draw if proyectile is moving - not yet
//Draw if player is moving (pay attention specially to this part)
if (pressedKey == 0) {
gameStarted = 0; //if ESC is pressed, exit the loop and exits
}
//If any of the Arrow Keys are pressed
else if (pressedKey > 1 && pressedKey < 6) { 
cout << "There's no problem in Else If statement"; //Couts made for testing
switch (pressedKey) {
cout << "There's no problem in Switch statement";
//Up
case 2:
Player.y -= Player.speed;
cout << "You moved Up";
break;
//Left
case 3:
Player.x -= Player.speed; //Fixed Left movement
cout << "You moved Left";
break;
//Down
case 4:
Player.y += Player.speed;
cout << "You moved Down";
break;
//Right
case 5:
Player.x += Player.speed;
cout << "You moved Right";
break;
};
//system("cls"); //Erase all
//draw(Player.x, Player.y); //Redraw everything, with Player.x and Player.y supposedly modified
};
};
};
return 0;
};

初始帖子：我正试图做一些类似于Undertale正常战斗的事情，现在我正在做"躲避攻击"的部分，但我一直在让玩家移动(是的，那个"a")，因为当我按下箭头键(移动)时，它没有更新。它应该绘制，并将Player放在Player.x和Player.y中，所以我在main()中做了一些事情，根据您按下的箭头键编辑这些变量，然后用修改后的Player.x或Player.y擦除并重新绘制。

这是代码：

#include <iostream>
#include <cmath>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <Windows.h>
using namespace std;
int detectKeyPressing(){
// 0: Escape
// 1: Enter
// 2: Up
// 3: Left
// 4: Down
// 5: Right
char keyPressed = 0;
while (keyPressed != 27){
if(keyPressed == 0){
keyPressed = _getch();
}
else if(keyPressed == 13){
return 1;
}
else{
switch (keyPressed) {
//Up
case 65:
return 2;
break;
//Left
case 68:
return 3;
break;
//Down
case 66:
return 4;
break;
//Right
case 67:
return 5;
break;
//Default
default: 
return -1;
break;
}
}
};
return 0;
};
int mainMenu(){
int enterPressed = 0;
cout << "Press Enter to Begin, or ESC to exit" << endl;
enterPressed = detectKeyPressing();
system("cls");
return enterPressed;
};
void draw(int playerX, int playerY) {
//Player coordinates, made for testing
cout << "Player.x = " << playerX << endl << "Player.y = " << playerY << endl;
//The next 8 spaces go blank
for (int i = 1; i < 8; i++) {
cout << endl;
}
//Square Limit Making
//Top Limit
for (int iw = 1; iw < 80; iw++) {
cout << "-";
}
cout << endl;
//Border limits and inside the Square
for (int ih = 1; ih < 30; ih++) {
//Left border
cout << "|";
//Inside the Square
for (int iw = 1; iw < 78; iw++) {
if (iw == playerX && ih == playerY){
cout << "a"; //This is supposed to be ♥ but I don't know how to put it in the screen with a cout
}
else {
cout << " ";
}
}
//Right border
cout << "|" << endl;
}
//Bottom limit  
for (int iw = 1; iw < 80; iw++) {
cout << "-";
}
}
int main(){
//Hide cursor
HANDLE hCon;
hCon = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 50;
cci.bVisible = TRUE;
SetConsoleCursorInfo(hCon, &cci);
//Variable Making
int gameStarted = -1; // 1 if game is running, 0 if not
//int t = 0; //Turn Counter, not useful for now
Sleep(200); //Wait to get a new seed
srand(time(NULL)); //Seed for rand()
//Menu Loop, remember, 1 if game starts running, 0 if you exit
while (gameStarted > 1 || gameStarted < 0) {
gameStarted = mainMenu();
}
//Like Void Start() in Unity
if (gameStarted == 1) {
class Player {
public:
int life = 20;
int accuracy = 80 + (rand() % 100) / 20;
int damage = 5 + (accuracy / 10) + (rand() % 100) / 50;
bool isAlive = true;
int x = 39;
int y = 24;
int speed = 2;
};
class Enemy {
public:
int life = 100;
int satisfaction = 0;
bool isAlive = true;
bool isSatisfied = false;
int damage = 2 + (rand() % 100) / 20;
};
Player Player;
Enemy Enemy;
draw(Player.x, Player.y);
//Like Void Update() in Unity
while (gameStarted != 0) {
//Draw if proyectile is moving - not yet
//Draw if player is moving (pay attention specially to this part)
if (detectKeyPressing() == 0) {
gameStarted = 0; //if ESC is pressed, exit the loop and exits
}
//If any of the Arrow Keys are pressed
else if (detectKeyPressing() > 1 && detectKeyPressing() < 6) { 
switch (detectKeyPressing()) {
//Up
case 2:
Player.y -= Player.speed;
break;
//Left
case 3:
Player.x += Player.speed;
break;
//Down
case 4:
Player.y += Player.speed;
break;
//Right
case 5:
Player.x += Player.speed;
break;
};
system("cls"); //Erase all
draw(Player.x, Player.y); //Redraw everything, with Player.x and Player.y supposedly modified 
};
};
};
return 0;
};

我做了一些测试，似乎"//如果按下任何箭头键"部分中的其他if没有运行，但我不知道为什么。

如果你能提供任何帮助，我将不胜感激。如果有什么写得不好，我很抱歉，我不是以英语为母语的人。