F - Andy's First Dictionary (UVA - 10815)

- 题目大意

给出一段文章,然后将其中不重复的单词拿出来(全为小写并且由a-z的顺序)。

- 解题思路

我在网上看到的一个stringstream函数,它除了进行字符串和数字转换之外的另一个用途:分割单词。将字符串中所有非单词字符全部转换为空格,然后再用代码中的方法分割出单词。有这种方法就好做多了。结合set容器即可。

- 代码

#include<iostream>
#include<set>
#include<string>
#include<sstream>
using namespace std;
int main()
{
	set<string>num;
	string c;
	string s1;
	while (cin>>c)
	{
		for (int i = 0; i < c.size(); i++)
		{
			if (isalpha(c[i]))
			{
				c[i] = tolower(c[i]);
			}
			else
				c[i]=‘ ‘;
		}
		stringstream s2(c);
		while(s2 >> s1)
		   num.insert(s1);
	}
	set<string>::iterator iptr;
	for (iptr = num.begin(); iptr != num.end(); iptr++)
	{

			cout << *iptr << endl;

	}

	return 0;
}

  

F - Andy's First Dictionary (UVA - 10815)

原文地址:https://www.cnblogs.com/alpacadh/p/8438516.html

时间: 2024-10-12 13:30:41

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