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c++ - C - 变量未初始化就被使用

转载 作者:太空宇宙 更新时间:2023-11-04 05:05:08 25 4
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我是 C/C++ 编程语言的新手。我想做简单的 Conway's Game of Life 使用 C 编程语言

我的代码如下所示:

#include "stdafx.h"

// Define some constants
const int DIM = 10;
int board[DIM][DIM];

int checkNeighbours(int x, int y) {
int left, right, top, bottom = 0;
int sum;

// Check neighbour cells
if (board[x - 1][y]) { left = 1; }
if (board[x + 1][y]) { right = 1; }
if (board[x][y - 1]) { top = 1; }
if (board[x][y + 1]) { bottom = 1; }

sum = left + right + top + bottom;

return sum;
}

// Build a board
void buildBoard() {
int i, j, neighbour_count;

for (i = 0; i < DIM; i++) {
for (j = 0; j < DIM; j++){

neighbour_count = checkNeighbours(i, j);

// Underpopulation
if (neighbour_count < 2) { board[i][j] = 0; }
// Lives if nc is 2 or 3
// Overpopulation
if (neighbour_count > 3) {
board[i][j] = 0;
}

// Revive
if (neighbour_count == 3) {
board[i][j] = 1;
}
}
}

// Predefined board cells
board[1][2] = 1;
board[1][3] = 1;
board[2][2] = 1;
}

void drawBoard() {
int i, j;

for (i = 0; i < DIM; i++) {
for (j = 0; j < DIM; j++) {
char figure= (board[i][j]) ? 'A' : '_';
printf("%c", figure);
}
printf("\n");
}
}

int main()
{
buildBoard();
drawBoard();

getchar();
return 0;
}

错误 我得到:

Run-Time Check Failure #3 - The variable 'left' is being used without being initialized.

Run-Time Check Failure #3 - The variable 'right' is being used without being initialized.

Run-Time Check Failure #3 - The variable 'top' is being used without being initialized.

我该如何解决这个问题,因为我已经初始化了这些变量。

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