Uva 10815 Andy's First Dictionary

1.eof()用ctrl + z手动输入

2.没有区分大小写

和标准代码比较

isalpha()

一种函数：判断字符ch是否为英文字母，若为小写字母，返回2，若为大写字母，返回1。若不是字母，返回0。

tolower()

#include <iostream>#include <set>#include <ctype.h>#include <cstdio>using namespace std;struct compare{    bool operator()(string s1, string s2)    {        return s1 < s2;    }};typedef set<string, compare>_SET;string eraPunct(string str){    bool has_punct = false;    string result_str;    for(string:: size_type index = 0; index != str.size(); ++index)    {        char ch = str[index];        if(ispunct(ch))        {            has_punct = true;        }        else        {            result_str += ch;        }    }    if(has_punct)        {           str = result_str;        }        return str;}int main(){    _SET s;    string str;    while(!cin.eof())    {        cin >> str;        s.insert(eraPunct(str));    }    set<string, compare>::iterator it = s.begin();    for(;it != s.end(); it++)    {        cout << *it << endl;    }    return 0;}