Need to replace words in sentences.

Question

Nothing has worked and I messed up somewhere along the line please help me figure out where I went wrong. I'm mainly supposed to use do while and while loops.Other fruits are to be replaced by pineapple.

#include <iostream>

#include <vector>

#include <string>

using namespace std;

int main()

{

vector<string> fruits; //what fruits are in the program

fruits.push_back("apple");

fruits.push_back("banana");

fruits.push_back("cherry");

fruits.push_back("coconut");

fruits.push_back("grape");

fruits.push_back("lime");

fruits.push_back("orange");

fruits.push_back("pineapple");

string input, Yes;

string input, no;

string sentence;

cout << "\n============================";

cout << "\n\nWelcome to our Fruit Finder";

cout << "\n\n============================";

cout << "\nYour fruit list contains: ";

cout << "apple, ";

cout << "banana, ";

cout << "cherry, ";

cout << "coconut, ";

cout << "grape, ";

cout << "lime, ";

cout << "orange.\n";

cout << "Please enter a sentence containing a fruit from the list above: ";

cin >> sentence;

cout << "Would you like to replace a fruit from your sentence?\n";

cout << "\nYes or no?\n" << endl;

cin >> input;

while (input == "Yes")

cout << "Which fruit will you replace?";

if ("apple") {

cout << "apple will be replaced by pineapple!";

}

else if ("banana") {

cout << "banana will be replaced by pineapple!";

}

else if ("cherry") {

cout << "cherry will be replaced by pineapple!";

}

else if ("coconut") {

cout << "coconut will be replaced by pineapple!";

}

else if ("grape") {

cout << "grape will be replaced by pineapple!";

}

else if ("lime") {

cout << "lime will be replaced by pineapple!";

}

else if ("orange") {

cout << "orange will be replaced by pineapple!";

}

if (input == "no")

cout << "You are not replacing fruit!";

return 0;

}

Answer 1

Here's a possible solution for the problem:

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

int main()
{
    std::vector<std::string> fruits = // what fruits are in the program (pineapple is not part of this vector)
    {
        "apple",
        "banana",
        "cherry",
        "coconut",
        "grape",
        "lime",
        "orange"
    };

    std::cout << "===========================" << std::endl << std::endl;
    std::cout << "Welcome to our Fruit Finder" << std::endl << std::endl;
    std::cout << "===========================" << std::endl << std::endl;
    std::cout << "Your fruit list contains: ";
    
    bool first = true;
    for (std::string fruit : fruits)
    {
        if (first)
            first = false;
        else
            std::cout << ", ";
        std::cout << fruit;
    }

    std::cout << std::endl << std::endl << "Please enter a sentence containing a fruit from the list above: ";
    std::string sentence;
    std::getline(std::cin, sentence);

    std::cout << "Would you like to replace a fruit from your sentence? (Yes or No?): ";
    std::string input;
    std::cin >> input;
    
    if (input == "Yes")
    {
        std::string fruitToReplace;
        std::string replacementFruit = "pineapple";
        std::vector<std::string>::const_iterator it;
        do
        {
            std::cout << "Which fruit will you replace? : ";
            std::cin >> fruitToReplace;
            it = std::find(fruits.cbegin(), fruits.cend(), fruitToReplace);
        }
        while (it == fruits.cend());
        
        std::cout << "Replacing " << *it << " by " << replacementFruit << "..." << std::endl;
        
        for (size_t start = 0; (start = sentence.find(fruitToReplace, start)) != std::string::npos; start += replacementFruit.length())
        {
            if (start != std::string::npos)
                sentence.replace(start, fruitToReplace.length(), replacementFruit);
        }
        
        std::cout << "After replacement: " << sentence << std::endl;
    }

    return 0;
}