UVa 400 Unix ls

這大概是我最近寫最快的一題:不到半天

	/*
	* UVa 400 (AC)
	* Author: chchwy
	* Last Modified: 2009.04.22
	*/
	#include <iostream>
	#include <cmath>
	using namespace std;
	bool cmpAscii(const string& a, const string& b)
	{
	int min = ( a.length() < b.length() ) ? a.length() : b.length();
	for (int i = 0; i < min; ++i)
	{
	if (a[i] < b[i])
	return true;
	else if (a[i] > b[i])
	return false;
	}
	if ( a.length() < b.length() )
	return true;
	return false;
	}
	int main()
	{
	#ifndef ONLINE_JUDGE
	freopen("400.in", "r", stdin);
	#endif
	string filename[100];
	int numFile;
	while (scanf("%d ", &numFile) == 1)
	{
	for (int i = 0; i < numFile; ++i)
	getline(cin, filename[i]);
	std::sort(filename, filename + numFile, cmpAscii);
	int longest = 0;
	for (int i = 0; i < numFile; ++i)
	if (filename[i].length() > longest)
	longest = filename[i].length();
	int colNum = 62 / (longest + 2);
	int rowNum = ceil((float)numFile / colNum); //無條件進位
	string row[101];
	cout << "------------------------------------------------------------\n";
	for (int i = 0; i < numFile; ++i)
	{
	int space = longest - filename[i].length();
	if (i / rowNum != colNum - 1) space += 2;
	for (int j = 0; j < space; ++j)
	filename[i] += " ";
	row[i % rowNum] += filename[i];
	}
	for (int i = 0; i < rowNum; ++i)
	cout << row[i] << endl;
	}
	return 0;
	}

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