CIS210 Introduction to C Programming Fall 2016 Assignment4 P

CIS-210 Introduction to C++ Programming (Fall 2016) Assignment-4 Points: 100 Due Date: 11/9/2016 (before class) Specifications Write a program that merges the integer numbers in two sorted files and writes all the numbers into a third file. Your program should prompt the user for the names of the two input files and the name of the output file. After the program is run, the output file will contain all the numbers in the two input files in one longer list in sorted order from smallest to largest. Your program should define a function that is called with two input file streams and the output file stream as three arguments. Sample Input/Output Enter name for input file-1: inputl.txt Enter name for input file-2: input2. Txt Enter name of output file: result.tbxt input1.txt 10 12 17 input2.txt 15 result.txt 10 12 15 17

// C++ code merge two files

#include <fstream> // file processing
#include <iostream> // cin and cout
#include <cctype> // toupper
#include <iomanip> // setw
#include <cstring> // cstring functions strlen, strcmp, strcpy stored in string.h
#include <string.h> // string class
#include <stdlib.h>
#include <vector>
using namespace std;

void merge(std::istream& file1,std::istream& file2, std::ostream& fout)
{
std::vector<int> v1;
std::vector<int> v2;
int d1;
int d2;

while (!file1.eof())
{

file1 >> d1;
v1.push_back(d1);
}

while (!file2.eof())
{

file2 >> d2;
v2.push_back(d2);
}

int i = 0, j = 0;
while(i < v1.size() && j < v2.size())
{
        if(v1[i] < v2[j])
        {
            fout << v1[i] << endl;
            i++;
        }
        else
        {
            fout << v2[j] << endl;
            j++;
        }
}

while (i < v1.size())
{

fout << v1[i] << endl;
i++;

}

while (j < v2.size())
{

fout << v2[j] << endl;
j++;

}

int main()
{
string fname1,fname2,fname3;

   cout<<\"Enter name for input file-1: \";
   cin >> fname1;
   cout<<\"Enter name for input file-2: \";
   cin >> fname2;
   cout<<\"Enter name of output file: \";
   cin >> fname3;

   std::ifstream file1(fname1.c_str());
   std::ifstream file2(fname2.c_str());
   std::ofstream fout(fname3.c_str());

   if (!file1.good() || !file2.good() || !fout.good())
   {
   std::cout << \"Error opening file(s)\" << std::endl;
   return 0;
   }

merge(file1,file2,fout);

   file1.close();
   file2.close();
   fout.close();

return 0;
}

/*
output:
Enter name for input file-1: input1.txt
Enter name for input file-2: input2.txt
Enter name of output file: output.txt

input1.txt
2
6
10
12
17

input2.txt
4
8
9
15

output.txt
2
4
6
8
9
10
12
15
17