给定矩阵行数和矩阵列数，顺时针打印矩阵（从0开始）

Posted 2020-06-30 棋子

//石头 2016 / 3 / 28 21:38 : 32
#include<iostream>
#include<vector>
using namespace std;

class Solution {
public:
    void printMatrix(vector<vector<int> > &matrix) {
        int count = 0;
        if (matrix.empty())
            return;
        int upEdge = 0;
        int leftEdge = 0;
        int rightEdge = matrix[0].size();
        int downEdge = matrix.size();
        bool end = false;
        char direction = ‘r‘;
        int i = 0;
        int j = 0;
        while (!end)
        {
            switch (direction)
            {
            case ‘r‘:
                if (j < rightEdge)
                {
                    while (j < rightEdge)
                    {
                        matrix[i][j] = count++;
                        j++;
                    }
                    upEdge += 1;
                    direction = ‘d‘;
                    i++;
                    j--;
                }
                else
                    end = true;
                break;
            case ‘d‘:
                if (i < downEdge)
                {
                    while (i < downEdge)
                    {
                        matrix[i][j] = count++;
                        i++;
                    }
                    direction = ‘l‘;
                    j--;
                    i--;
                    rightEdge -= 1;
                }
                else
                    end = true;
                break;
            case ‘l‘:
                if (j >= leftEdge)
                {
                    while (j >= leftEdge)
                    {
                        matrix[i][j] = count++;
                        j--;
                    }
                    direction = ‘u‘;
                    i--;
                    j++;
                    downEdge -= 1;
                }
                else
                    end = true;
                break;
            case ‘u‘:
                if (i >= upEdge)
                {
                    while (i >= upEdge)
                    {
                        matrix[i][j] = count++;
                        i--;
                    }
                    leftEdge += 1;
                    direction = ‘r‘;
                    j++;
                    i++;
                }
                else
                    end = true;
                break;
            default:
                break;
            }
        }
    }
};

int  main()
{
    int m = 0;
    int n = 0;
    while (cin >> m >> n)
    {
        if (m != 0 && n != 0)
        {
            vector<vector<int> > maxtrix(m, vector<int>(n, 0));
            class Solution test;
            vector<int> result;
            test.printMatrix(maxtrix);
            for (int i = 0; i < m; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    cout << maxtrix[i][j];
                    if (j != n - 1)
                        cout << " ";
                }
                if (i != m - 1)
                    cout << endl;
            }
        }
    }
}