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我已经创建了这段代码,当我运行它时,直到箭头离开屏幕(即:(*I)->x>maxx)之前不会出现任何错误,之后O将随机传送(嗯,我'我猜它不是随机的,但我正在尝试找到它的模式)。

编辑:如果我向上移动,似乎不会发生随机传送,如果我向下移动,O 会直接传送到底部。此外,在 O 变为“>”的地方发生了故障。(我试图弄清楚这是怎么发生的)

编辑:如果 O 位于屏幕的右下角 (player.x=9;player.y=9) 并且输入了序列“wqs”,则会发生转换为-'>' 的故障。

编辑:我已经删除了类声明,因为我相当确定错误在 _move()s 和 check() 中。

编辑:输入“wq”时出现转换故障,然后输入任何其他字符(即“跳过”下一步)

编辑:当 player.x=9; 时发生转换故障;玩家.y=8; 然后按下'q',玩家的下一个动作变成'>'

这是代码:

#include<vector>
#include<iostream>
#include<string>
using namespace std;
const int maxx = 10, maxy = 10; //two constants that show the size of the sector
char sector[maxx][maxy]; //array of characters used to display the sector
prgm player(0, 0, 'O'); //player definition at x0,y0,and displayed with 'O'
const int vsize = 1; //size of the enemy array (ie: how many enemies there will be
X1 a(9, 5, 'X', 10); //enemy "a", has a move function that moves it back and forth
virus * viral_data[vsize] = {&a}; //array of enemies used to set the sector
vector<antivirus*> antiviral_data; //vector of pointers to "antivirus" the weapon used
vector<antivirus*>::iterator I; //iterator for previous vector

void display() //function to display the sector
{
    for(int i = 0; i < maxy; i++) 
    {
        for(int j = 0; j < maxx; j++)
        {
            cout<<sector[j][i];
        }
        cout<<endl;
    }
    return;
}

void p_move() //function to get players input, then move the player or create "antivirus"
{
    char dir;
    cin>>dir;
    switch(dir)
    {
    case 'w':
        player.y--;
        break;
    case 'a':
        player.x--;
        break;
    case 's':
        player.y++;
        break;
    case 'd':
        player.x++;
        break;
    case 'q':
        antiviral_data.push_back(new aX1(player.x, player.y, '>')); //creates a new aX1 at the players position
        break;
    }
    return;
}

void v_move() //uses the enemies move
{
    for(int i = 0; i < vsize; i++)
    {
        viral_data[i]->move();
    }
    return;
}

void a_move() //uses the weapon (ie: moves the weapon forward)
{
    for(I = antiviral_data.begin(); I < antiviral_data.end(); I++)
    {
        (*I)->move();
    }
    return;
}

void set() //sets the sector array (char)
{
    for(int i = 0; i < maxy; i++)
    {
        for(int j = 0; j < maxx; j++)
        {
            sector[j][i] = ' '; makes the entire sector blank
        }
    }
    sector[player.x][player.y]=player.sym; //sets the sector at the player's position to 'O'
    for(int i = 0; i < vsize; i++)
    {
        sector[viral_data[i]->x][viral_data[i]->y] = viral_data[i]->sym; //sets the sector at each enemy's position to be 'X'
    }
    for(I = antiviral_data.begin(); I < antiviral_data.end(); I++)
    {
        sector[(*I)->x][(*I)->y] = (*I)->sym; //sets the sector at each weapon's position to be '>'
    }
    return;
}

void check() //prevents the player from moving off the screen, erases bullet if it moves of the screen (to prevent access to non-allocated memory)
{
    if(player.x < 0)
    {
        player.x = 0;
    }
    if(player.y < 0)
    {
        player.y = 0;
    }
    if(player.x > (maxx-1))
    {
        player.x = (maxx-1);
    }
    if(player.y > (maxy-1))
    {
        player.y = (maxy-1);
    }
     //PROBLEM APPEARS TO OCCUR HERE
    for(I = antiviral_data.begin(); I! = antiviral_data.end();)
    {
        if((*I)->x > maxx)
        {
            I = antiviral_data.erase(I);
        }
        else
        {
            I++;
        }
    }
     //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

    return;
}
int main()
{
    while(true)
    {
        set(); //set sector
        display(); //display sector
        p_move(); //player's move
        v_move(); //enemy's move
        a_move(); //bullet's move
        check();//check moves
    }
    return 0;
}
4

1 回答 1

5

在 check() 中,测试

((*I)->x > maxx)

应该

((*I)->x >= maxx)

. 这是一个不相上下的错误,它让 > 离开屏幕一格。当显示例程试图显示它时,它会破坏 X 的显示符号。

于 2009-05-03T18:03:00.570 回答