Question

c++

Assume the following functions have already been defined, write a main() to read the words of file "in.txt",
the illegal words in "illegal.txt", and after removing the words that are illegal,
output the remaining words to the file "clean.txt"

vector<string> readFile(ifstream & inFile); // return words of file in vector
vector<string> readIllegal(ifstream &illegalFile); // return vector of illegal words
void writeCensored(ofstream & outFile, vector<string> words); // writes vector into file

Answer 1

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

using namespace std;

vector<string> readFile(ifstream &inFile);

vector<string> readIllegal(ifstream &illegalFile);

void writeCensored(ofstream &outFile, vector<string> words);

// This main function is the answer
int main() {
    ifstream in1("in.txt");
    ifstream in2("illegal.txt");
    ofstream out("clean.txt");
    vector<string> words = readFile(in1);
    vector<string> illegalWords = readIllegal(in2);
    vector<string> result;
    for (int i = 0; i < words.size(); i++) {
        bool found = false;
        for (int j = 0; j < illegalWords.size(); j++) {
            if (words[i] == illegalWords[j]) {
                found = true;
            }
        }
        if (!found) {
            result.push_back(words[i]);
        }
    }
    writeCensored(out, result);

    in1.close();
    in2.close();
    out.close();
    return 0;
}

// I've written the function definitions as well if you are interested in what it looks like.
vector<string> readFile(ifstream &inFile) {
    vector<string> s;
    string word;
    while (inFile >> word) {
        s.push_back(word);
    }
    return s;
}

vector<string> readIllegal(ifstream &illegalFile) {
    return readFile(illegalFile);
}

void writeCensored(ofstream &outFile, vector<string> words) {
    for (int i = 0; i < words.size(); ++i) {
        outFile << words[i] << endl;
    }
}