UVA10815 Andy's First Dictionary

问题链接:UVA10815 Andy‘s First Dictionary

题意简述:输入一个文本文件,从中提取出字典,重复的单词被去掉。

这个问题用C++语言编写程序,主要是为了练习使用STL的功能。另外一点,C++编写程序效率会更高。

使用STL容器类的set,可以方便地去重复,而且还会自动排序。

程序中,使用C语言的库函数strtok()来切割单词,并且用空格‘ ‘作为分隔符。这是一种简便的做法。

另外一种切割字符串的方法是,使用STL的字符串流(sstream)实现。

AC的C++程序如下:

/* UVA10815 Andy's First Dictionary */

#include <iostream>
#include <cstring>
#include <set>

using namespace std;

#define MAXN 512

set<string> dict;

int main()
{
    char s[MAXN], delim[] = " ", *p;

    while(cin >> s) {
        p = s;
        while(*p) {
            if(isalpha(*p))
                *p = tolower(*p);
            else
                *p= ' ';
            p++;
        }

        p = strtok(s, delim);
        while(p) {
             dict.insert(p);
             p = strtok(NULL, delim);
        }
    }

    for(set<string>::iterator iter =dict.begin(); iter != dict.end(); iter++)
        cout << *iter << "\n";

    return 0;
}

UVA10815 Andy's First Dictionary

时间: 2024-10-21 00:14:49

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