CCF_ 201512-3_画图

直接模拟就行了，注意坐标系方向与平常数组不一样，填充操作用深搜和广搜都可以，这里用了广搜。

#include<iostream>
#include<cstdio>
#include<cstring>
#include<queue>
using namespace std;

struct point{
    int x,y;
};

int m,n,q,dir[][2] = {{0,1},{0,-1},{-1,0},{1,0}};
char a[105][105];

void line()
{
    int x1,x2,y1,y2;
    cin >> x1 >> y1 >> x2 >> y2;
    if(x1 == x2)
    {
        int down = min(y1,y2),up = max(y1,y2);
        for(int i = down;i <= up;i++)
        {
            if(a[i][x1] == '-' || a[i][x1] == '+')  a[i][x1] = '+';
            else    a[i][x1] = '|';
        }
    }
    else
    {
        int left = min(x1,x2),right = max(x1,x2);
        for(int i = left;i <= right;i++)
        {
            if(a[y1][i] == '|' || a[y1][i] == '+')   a[y1][i] = '+';
            else    a[y1][i] = '-';
        }
    }
}

void bfs()
{
    point start;
    char str;
    cin >> start.x >> start.y >> str;
    a[start.y][start.x] = str;
    queue<point> q;
    q.push(start);
    while(!q.empty())
    {
        int x = q.front().x,y = q.front().y;
        q.pop();
        for(int i = 0;i < 4;i++)
        {
            int xx = x+dir[i][0],yy = y+dir[i][1];
            if(xx < 0 || xx >= m || yy < 0 || yy >= n || a[yy][xx] == '-' || a[yy][xx] == '|' || a[yy][xx] == '+' || a[yy][xx] == str)   continue;
            point temp;
            temp.x = xx;
            temp.y = yy;
            q.push(temp);
            a[yy][xx] = str;
        }
    }
}
int main()
{
    cin >> m >> n >>q;
    for(int i = 0;i < n;i++)
    {
        for(int j = 0;j < m;j++)    a[i][j] = '.';
    }
    while(q--)
    {
        int flag;
        cin >> flag;
        if(flag)    bfs();
        else        line();
    }
    for(int i = n-1;i >= 0;i--)
    {
        for(int j = 0;j < m;j++)    cout << a[i][j];
        cout << endl;
    }
    return 0;
}