访问冲突写入 c 中的二维数组

Question

I'm trying to initialise a 2d array, and for some reason I'm getting an exception whenever I try to enter a value into the array.

I'm passing it to the function in a struct, if that makes a difference?

Here's the code:

#define board_size 10

typedef struct {
    int b[board_size][board_size];
} board;

board dead_state();     // initialise a dead board state

void main() {
    board test_board = dead_state();

    for (int i = 0; i < board_size - 1; i++) {
        for (int j = 0; j < board_size - 1; i++) {
            test_board.b[i][j] = 0;
        }
    }
}

board dead_state() {
    // generate the matrix, set all values to 0, return
    board deadboard;

    for (int i = 0; i < board_size - 1; i++) {
        for (int j = 0; j < board_size - 1; i++) {
            deadboard.b[i][j] = 0;
        }
    }

    return deadboard;
}

edit: problem solved, thanks to hyde's comment: i am blind and cannot see, apparently.

Answer 1

You have what looks like a typo.

    for (int i = 0; i < board_size - 1; i++) {
        for (int j = 0; j < board_size - 1; i++) {
            test_board.b[i][j] = 0;
        }
    }

Both loops increment i , which means i goes out of bounds. You likely meant for the inner loop to increment j , but I don't know why you're only incrementing i and j up to 8 , instead of 9 .