acwing756蛇形矩阵C语言

以下是acwing756蛇形矩阵的C语言代码实现：

#include <stdio.h>

const int N = 110;

int n, m;
int a[N][N];

int main()
{
    scanf("%d%d", &n, &m);

    int x = 1, y = 1, tot = 0;
    while (tot < n * m)
    {
        while (y <= m && !a[x][y]) a[x][y++] = ++tot;
        y--, x++;
        while (x <= n && !a[x][y]) a[x++][y] = ++tot;
        x--, y--;
        while (y >= 1 && !a[x][y]) a[x][y--] = ++tot;
        y++, x--;
        while (x >= 1 && !a[x][y]) a[x--][y] = ++tot;
        x++, y++;
    }

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            printf("%d%c", a[i][j], j == m ? '\n' : ' ');

    return 0;
}