模拟桌面自动整理， 先顶左，再顶上。

5 6
**##**
****#*
***##*
#*****
***#**

##****
##****
#*****
#*****
#*****

#include 
using namespace std;
#define MAX  1024

char a[MAX][MAX];
void H(char arr[][MAX], int n,int idx) {//n列数	,idx 某行
	int left = 0;
	int right = n - 1;
	char t;
	while (left < right) {
		int left = 0;
		int right = n - 1;

		while (arr[idx][left] == '#')
			left++;
		while (arr[idx][right] == '*')
			right--;
		if (left >= right)
			break;

		t = arr[idx][left];
		arr[idx][left] = arr[idx][right];
		arr[idx][right] = t; 
	}
}


void L(char arr[][MAX], int n, int idx) {//n行数	,idx 某列
	int top = 0;
	int down = n - 1;
	char t;
	while (top < down) {
		int top = 0;
		int right = n - 1;

		while (arr[top][idx] == '#')
			top++;
		while (arr[down][idx] == '*')
			down--;
		if (top >= down)
			break;

		t = arr[top][idx];
		arr[top][idx] = arr[down][idx];
		arr[down][idx] = t;
	}
}


 
void print(int h,int l) {
	for (int i = 0; i < h; i++) {
		for (int j = 0; j < l; j++)
			cout << a[i][j];
		cout << endl;
	}
}

int main() {
	int h, l;
	cin >> h>>l;
	for (int i = 0; i < h; i++) {
		for (int j = 0; j < l; j++)
			cin >> a[i][j];
		getchar();
	}
	//print(h,l);

	for (int i = 0; i < h; i++) 
		H(a,l,i);
	

	for (int i = 0; i < h; i++) 	
		L(a,h,i);
	print(h, l);

	

	return 0;
}