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来自洛谷，原作者为

	SUNCHAOYI 报名个人赛 https://www.luogu.com.cn/contest/44296

搬运于2025-08-24 22:13:50，当前版本为作者最后更新于2020-02-04 21:44:50，作者可能在搬运后再次修改，您可在原文处查看最新版

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以下是正文

每一个数字都有 $3 \times 5$ 的点阵组成，设五个数组 $ans_1 \sim ans_5$ 分别记录一个数字的五个行的构成情况，用 if 语句即可：

if(s[i] == '0')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "X.X";ans[2] += "X.X";ans[3] += "X.X";
}
if(s[i] == '1')
{
	ans[0] += "..X";ans[4] += "..X";
	ans[1] += "..X";ans[2] += "..X";ans[3] += "..X";
}
if(s[i] == '2')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "..X";ans[2] += "XXX";ans[3] += "X..";
}
if(s[i] == '3')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "..X";ans[2] += "XXX";ans[3] += "..X";
}
if(s[i] == '4')
{
	ans[0] += "X.X";ans[4] += "..X";
	ans[1] += "X.X";ans[2] += "XXX";ans[3] += "..X";
}
if(s[i] == '5')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "X..";ans[2] += "XXX";ans[3] += "..X";
}
if(s[i] == '6')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "X..";ans[2] += "XXX";ans[3] += "X.X";
}
if(s[i] == '7')
{
	ans[0] += "XXX";ans[4] += "..X";
	ans[1] += "..X";ans[2] += "..X";ans[3] += "..X";
}
if(s[i] == '8')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "X.X";ans[2] += "XXX";ans[3] += "X.X";
}
if(s[i] == '9')
{
	ans[0] += "XXX";ans[4] += "XXX";
	ans[1] += "X.X";ans[2] += "XXX";ans[3] += "..X";
}

然后每个数字的显示之间加一列 . 即可。

if(i != s.size() - 1) 
{
	ans[0] += ".";ans[4] += ".";
	ans[1] += ".";ans[2] += ".";ans[3] += ".";
}