Write a program to generate personalized junk mail. The program takes input both from an input file and from the keyboard. The input file contains the text of a letter, except that the name of the recipient is indicated by the three characters #N#. The program asks the user for a name and then writes the letter to a second file but with the three letters #N# replaces by the name. The three-letter string #N# will occur multiple times in the letter. Only the first name of the recipient is required You can ask the user to input the file name, or hard code the file name. you should write a function that reads from the file contains the body and writes to junk mail file

#include <iostream>

#include <fstream>

using namespace std;

void replace(ifstream&,ofstream&);

int main()

{char filename[30];

bool found=false;

cout<<"what is the name of the input file youare using? ";

cin>>filename;

ifstream input;

ofstream output;

input.open(filename);    

if(input.fail())

{ cout<<"file did notopen please check it\n";

system("pause");

return 1;

}

cout<<"what is the name of theoutput file you are using? ";

cin>>filename;

cin.ignore(100,'\n');

output.open(filename);

replace(input,output);

input.close();

output.close();

system("pause");

return 0;

}

void replace(ifstream& in,ofstream& out)    

{bool found=false;

string lookfor="#N#";

string data,name;

int n;

getline(in,data);

while(in)

{if(!found)

{n=data.find(lookfor,0);

if(n!=-1)

{found=true;

cout<<"Enter name: ";

getline(cin,name);

data.replace(n,3,name);

}    

}

out<<data<<endlu;

getline(in,data);

}

}