我参加了一个C ++课程，不像我所有的学生，我使用xcode购买了Mac来运行和编辑我的文件。但最近有一段代码，可以在Ubuntu系统中运行良好，但在我的Mac中，它一直给我错误。
错误出现在这一行：char（* maze）[width] = reinterpret_cast（m_maze）; 并且有3行具有相同的上述内容。如果您使用Ubuntu中的代码，它会成功运行，但在mac中，它会终止并报告3个相同的错误。
警告说：无法初始化类型＆＃39; char（）[width]＆＃39; rvalue为＆＃39; char（）[width]＆＃39;
Plz帮助
代码是关于MAZE中的鼠标。 这是代码：
#include <iostream>
#include <stdexcept>
#include <cstdlib>
#include <cstdio>
using namespace std;
const char MOUSE = '*';
const char WAY = ' ';
const char WALL = '@';
const char PASS = '.';
const char IMPASS = 'X';
typedef enum tag_Direction {
EDIR_RIGHT,
EDIR_DOWN,
EDIR_LEFT,
EDIR_UP
} EDIR;
class Stack {
public:
Stack (void) : m_top (NULL) {}
~Stack (void) {
for (Node* next; m_top; m_top = next) {
next = m_top -> m_next;
delete m_top;
}
}
void push (EDIR dir) {
m_top = new Node (dir, m_top);
}
EDIR pop (void) {
if (! m_top)
throw underflow_error ("Underflow of Stack！");
EDIR dir = m_top -> m_dir;
Node* next = m_top -> m_next;
delete m_top;
m_top = next;
return dir;
}
private:
class Node {
public:
Node (EDIR dir, Node* next) : m_dir (dir),
m_next (next) {}
EDIR m_dir;
Node* m_next;
};
Node* m_top;
};
class Mouse {
public:
Mouse (size_t x, size_t y) : m_x (x), m_y (y),
m_total (0), m_valid (0) {}
size_t getx (void) const {
return m_x;
}
size_t gety (void) const {
return m_y;
}
size_t gettotal (void) const {
return m_total;
}
size_t getvalid (void) const {
return m_valid;
}
void stepright (void) {
m_x++;
remember (EDIR_RIGHT);
}
void stepdown (void) {
m_y++;
remember (EDIR_DOWN);
}
void stepleft (void) {
m_x--;
remember (EDIR_LEFT);
}
void stepup (void) {
m_y--;
remember (EDIR_UP);
}
void stepback (void) {
switch (recall ()) {
case EDIR_RIGHT:
m_x--;
break;
case EDIR_DOWN:
m_y--;
break;
case EDIR_LEFT:
m_x++;
break;
case EDIR_UP:
m_y++;
break;
}
}
private:
void remember (EDIR dir) {
m_brain.push (dir);
m_total++;
m_valid++;
}
EDIR recall (void) {
EDIR dir = m_brain.pop ();
m_total++;
m_valid--;
return dir;
}
size_t m_x;
size_t m_y;
size_t m_total;
size_t m_valid;
Stack m_brain;
};
class Game {
public:
Game (size_t width, size_t height) :
m_width (width), m_height (height),
m_maze (new char[width * height]),
m_mouse (0, 1) {
if (height < 3)
throw invalid_argument ("The maze is too small！");
srand (time (NULL));
char (*maze)[width] = reinterpret_cast<char (*)[width]> (m_maze);**
for (size_t i = 0; i < height; i++)
for (size_t j = 0; j < width; j++)
if (i == m_mouse.gety () &&
j == m_mouse.getx ())
maze[i][j] = MOUSE;
else
if ((i == 1 && j < 4) ||
(i == height - 2 && j >width-5))
maze[i][j] = WAY;
else
if (i == 0 || i == height - 1 ||
j == 0 || j == width - 1)
maze[i][j] = WALL;
else
maze[i][j] =
rand () % 4 ? WAY : WALL;
}
~Game (void) {
if (m_maze) {
delete[] m_maze;
m_maze = NULL;
}
}
void run (void) {
for (show (); ! quit () && step (););
}
private:
void show (void) {
char (*maze)[m_width] = reinterpret_cast<char (*)[m_width]> (m_maze);
for (size_t i = 0; i < m_height; i++) {
for (size_t j = 0; j < m_width; j++)
cout << maze[i][j];
cout << endl;
}
cout << "Total steps：" << m_mouse.gettotal ()
<< "，Valid steps：" << m_mouse.getvalid ()
<< endl;
}
bool quit (void) {
cout << "Press<Q>to exit，Other keys to continue..."<<flush;
int ch = getchar ();
cout << endl;
return ch == 'Q' || ch == 'q';
}
bool step (void) {
char (*maze)[m_width] = reinterpret_cast<char (*)[m_width]> (m_maze);
size_t x = m_mouse.getx ();
size_t y = m_mouse.gety ();
if (x + 1 <= m_width - 1 && maze[y][x + 1] == WAY) {
maze[y][x] = PASS;
m_mouse.stepright ();
}
else
if (y + 1 <= m_height - 1 &&
maze[y + 1][x] == WAY) {
maze[y][x] = PASS;
m_mouse.stepdown ();
}
else
if (x - 1 >= 0 &&
maze[y][x - 1] == WAY) {
maze[y][x] = PASS;
m_mouse.stepleft ();
}
else
if (y - 1 >= 0 &&
maze[y - 1][x] == WAY) {
maze[y][x] = PASS;
m_mouse.stepup ();
}
else {
maze[y][x] = IMPASS;
m_mouse.stepback ();
}
x = m_mouse.getx ();
y = m_mouse.gety ();
maze[y][x] = MOUSE;
show ();
if (x == 0 && y == 1) {
cout << "I can't get out！cry~~~~" << endl;
return false;
}
if (x == m_width - 1 && y == m_height - 2) {
cout << "I am OUT！！！" << endl;
return false;
}
return true;
}
size_t m_width;
size_t m_height;
char* m_maze;
Mouse m_mouse;
};
int main (int argc, char* argv[]) {
if (argc < 3) {
cerr << "Method：" << argv[0] << " <width> <height>"
<< endl;
return -1;
}
try {
Game game (atoi (argv[1]), atoi (argv[2]));
game.run ();
}
catch (exception& ex) {
cout << ex.what () << endl;
return -1;
}
return 0;
}
答案 0 :(得分：0)
char (*maze)[width] = reinterpret_cast<char (*)[width]> (m_maze);
不标准：警告：ISO C ++禁止可变长度数组＆＃39;迷宫＆＃39; [-Wvla]。
你必须使用
m_maze[y * width + x]
而不是
maze[y][x]