list of non repeated words

readwords.cpp

// readwords.cpp
// juanfc 2020-12-14
// A simple case of word reading and simply adding
//  non-repeated ones to a list, a simple array
//  of strings
// 

#include <iostream>
#include <array>
using namespace std;
const int N = 100;

typedef array<string,N> TWords;

void add(TWords& l, string w);

int main()
{
    string w; // w.lenght() -> 0
    TWords listOfWords;

    while (cin >> w and w != "end")
        add(listOfWords, w);

    return 0;
}

void add(TWords& l, string w)
{
    // we suppose space enough in our list
    int i = 0;
    while ( l[i] != "" and w != l[i]  )
        ++i;
    if (l[i] == "") // not found
        l[i] = w;   // add it the last
}