#include <iostream>
#include <vector>
#include <cctype> 
#include <string>
#include <iostream>
 
using namespace std;
 
vector<string>words;
 
//stores words to vector words
void storeWords()
{
    cout << "Input 8 words: " << endl;
    string s = " ";
    for(int i=0; i<=7; i++)
    {
        cin >> s;
        words.push_back(s);
    }
}
//prints our words
void printWords()
{
    cout << "\n Words stored in vector: " << endl;
    for (const string s : words)
        cout << s << endl;
}
 
//replaces chars of the first word with a '?' sign
void replace1(vector<string>&v)
{
    cout << "\nReplaced characters of the first word " << words[0] << " with '?'" << endl;
    for (char c : words[0])
        cout << "?";
}
 
void replace2(vector<string>&v)
{
    for (char& c : words[7])
    {
        if(islower(c))
            c = toupper(c);
    }
    cout << endl;
    cout << words[7]<<endl;
}
 
 
int main()
{
    storeWords();
    printWords();
    replace1(words);
    replace2(words);
 
    return 0;
}

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Hello my name is bob and i like