Question

how to write a c++ program that replaces certain words with two "**"

input: I went to the store

To buy some fruit

Apples are red

I like oranges better

I saw grapes are green

apples are red, oranges, grapes are green (sub strings that need to be replaced)

iterate through the string input and get an output that replaces the sub strings with **

If the sub strings are not in the input just return the string as it is

Just replace what is in the string if it matches the sub string so if it says in the string I saw grapes are green and the sub string that needs replacing is grapes are green just replace grapes are green. If it just says grapes in the sentence do not replace it.

Answer 1

#include <iostream>
#include <string>

void findReplace(std::string & input, std::string subStr, std::string replaceWith)
{
   // Get the first occurrence of the subString
   size_t firstPosition = input.find(subStr);

   // Repeat using while loop till end is reached
   while( firstPosition != std::string::npos)
   {
       // Replace the occurrence of subString
       input.replace(firstPosition, subStr.size(), replaceWith);
       // Get the next occurrence of the string after the current position
       firstPosition =input.find(subStr, firstPosition + replaceWith.size());
   }
}

int main()
{
//Initialize the string
   std::string input = "I went to the store To buy some fruit Apples are red I like oranges better I saw grapes are green";

//Print the string
   std::cout<<input<<std::endl;

//Call findReplace and replace the subString
   findReplace(input, "Apples are red", "**");
   findReplace(input, "oranges", "**");
   findReplace(input, "grapes are green", "**");

//Print the new string
   std::cout<<input<<std::endl;


   return 0;
}