words_assort.cpp

A group of word-analysis examples for C++/STL novices

/*
*  Description:
*
*    Assort words.
*
*  History:
*
*    Initial version created by Royal, Mar. 2004.
*
*  Notes:
*
*    This code has been written to conform to standard C++ and STL. It has been
*    compiled successfully using GNU C++ 3.2, Borland C++ 5.5, and Visual C++ 7.0.
*/

#include<iostream>
#include<string>
#include<vector>

using namespace std;

void output(const vector<string>& words);
void assort(string word, vector<string>& lower_words, vector<string>& upper_words, vector<string>& other_words);

int main()
{   
    string word;
    vector<string>lowers, uppers, others;
    cout << "Please input a series of words:" << endl;
    while(cin >> word) assort(word, lowers, uppers, others);
    cout << " The words in lowercase:" << endl;
    output(lowers);
    cout << "The words in uppercase:" << endl;
    output(uppers);
    cout << "others:" << endl;
    output(others);
}

void assort(string word, vector<string>& lower_words, vector<string>& upper_words, vector<string>& other_words)
{
    char* initial = &word[0];
    if (islower(*initial))
    {
        while(islower(*initial))
        {
            initial++;
            if(*initial == '\0') lower_words.push_back(word);            
        }
        if(*initial != '\0') other_words.push_back(word);
    }
    else if(isupper(*initial))
    {
        while(isupper(*initial))
        {
            initial++;
            if(*initial == '\0') upper_words.push_back(word);           
        }
        if(*initial != '\0') other_words.push_back(word);
    }
    else other_words.push_back(word);
}

void output(const vector<string>& words) 
{
    vector<string>::const_iterator it = words.begin();
    vector<string>::const_iterator end_it = words.end(); 
    while (it != end_it)
    {
        cout << *it << "\t";
        ++it;
    }
    cout << endl;
}