Question

Write a C++ program that reads in input until the EOF.

The program should output the input exactly...with the following changes:

Anytime the substring "New York University", "American", or "Lady gaga" appears in the text, it should be replaced with 5 asterisks "*****".

Example:

Input:

New York University safmsa qwqoca  

safffja qwrq ssss 23333

af21jspof American shfafh121 Lady gaga spdj1-

（Note that this is a paragraph with ONE line in the middle)

Output:

***** safmsa qwqoca

safffja qwrq ssss 23333

af21jspof ***** shfafh121 ***** spdj1-

Answer 1

below is the detailed explanation I hope you will understand it properly

I am reading data from the data file

#include<bits/stdc++.h>
using namespace std;
int main(){
ifstream file; //input stream
file.open("data");//opening a file
string s;
string str = "";
while(file>>s){ //reading data and writing it to s
str+=s+" "; //storing s to str
}
//it's our actual string
cout<<"print the actual string\n";
cout<<str<<"\n\n";
  
//Lets first check for New York University
//and its count is 19
string str1 = "New York University";// first substring
size_t index = str.find(str1); //finding the first index of str1(New York University)
while(index != string::npos){ // if index is not equal to the end of the str then we have found the substring
string temp = str.substr(0,index); //storing values from 0 to the first index
string x = "*****"; //adding 5 starts to the x
temp+=x; //adding it to the temp which is a temporary variable
  
int start = index+str1.size(); // now we need to skip str1 or(New York University) from our actual string becuase we have replaced it with 5 starts

// New York University starting index

int end = str.size()-start; //New York University ending index so we skiped this string from start to end
  
temp+=str.substr(start,end); //now adding rest of the string to temp which we need
str = "";
str = temp; // now assigning temp to str
index = str.find(str1); // finding the index again if any exist

  
}
// printing our string without str1
cout<<"after removing New York University \n";
cout<<str<<"\n\n";
  
//same is the case for ther substring so i am not writing comments for them i hope you understands
// .......................////////////////////////////////////////////////..................
//now check for "American"
str1 = "American";
index = str.find(str1);
while(index != string::npos){
//string ::npos it return the maximum possible value that can be stored in size_t if the substring is not find it is beeter way to check
string temp = str.substr(0,index);
string x = "*****";
temp+=x;
  
int start = index+str1.size();
  
int end = str.size()-start;
  
temp+=str.substr(start,end);
str = "";
str = temp;
index = str.find(str1);
}
cout<<"after removing American"<<endl;
cout<<str<<"\n\n";
  
// .....................................///////////////////////////////////////////////.....................
//now check for Lady gaga
str1 = "Lady gaga";
index = str.find(str1);
while(index != string::npos){
string temp = str.substr(0,index);
string x = "*****";
temp+=x;
  
int start = index+str1.size();
  
int end = str.size()-start;
  
temp+=str.substr(start,end);
str = "";
str = temp;
index = str.find(str1);
}
cout<<"after removing Lady gaga"<<endl;
cout<<str<<endl;
}

output file