Convert from Java to C++ import java.io.*; import java.lang.*; import java.util.

Question

Convert from Java to C++

import java.io.*;

import java.lang.*;

import java.util.*;

public class HelloWorld

{

public static void main(String[] args)throws Exception

{

int ch;

Scanner s=new Scanner(System.in);

while(true)

{

    System.out.println("Menu");

    System.out.println("1. Sale Product");

    System.out.println("2. Ending day sale report");

    System.out.println("3. Ending month sale report");

    System.out.println("4. Ending year sale report");

    System.out.println("0.Exit");

    System.out.println("Enter your choice");

    ch=s.nextInt();

    if(ch==1)

    saleproduct(s);

    else if(ch==2)

    dayreport();

    else if(ch==3)

    monthreport();

    else if(ch==4)

    yearreport();

    else

    System.exit(0);

}

}

public static void saleproduct(Scanner s)throws Exception

{

String tno;

int nA;

int nB;

double Aprice;

double Bprice;

double amt;

int ch;

BufferedWriter b=new BufferedWriter(new FileWriter(new File("Sale_2016_07_20.txt")));

System.out.println("Sale report");

do

{

System.out.println("Enter transaction number");

tno=s.next();

System.out.println("Enter number of Model A units sold:");

nA=s.nextInt();

System.out.println("Enter the price of model A unit:");

Aprice=s.nextDouble();

System.out.println("Enter number of Model B units sold:");

nB=s.nextInt();

System.out.println("Enter the price of model B unit:");

Bprice=s.nextDouble();

System.out.println("Enter the amount paid of customer");

amt=s.nextDouble();

System.out.println(tno+" "+nA+" "+Aprice+" "+nB+" "+Bprice+" "+amt+" ");

b.write(tno+" "+nA+" "+Aprice+" "+nB+" "+Bprice+" ");

System.out.println("Do u want to enter another trnscation details:");

ch=s.nextInt();

}while(ch==1);

b.close();

}

public static void dayreport()throws Exception

{

String saleline;

String[] temp;

int nA=0;

int nB=0;

double Aprice=0;

double Bprice=0;

int t1,t2;

double t3,t4;

double totalMoney=0;

BufferedReader r=new BufferedReader(new FileReader("Sale_2016_07_20.txt"));

while((saleline=r.readLine())!=null)

{

temp=saleline.split(" ");

t1=Integer.parseInt(temp[1]);

t2=Integer.parseInt(temp[3]);

t3=Double.parseDouble(temp[2]);

t4=Double.parseDouble(temp[4]);

nA=nA+t1;

nB=nB+t2;

Aprice+=t1*t3;

Bprice+=t2*t4;

totalMoney+=Aprice+Bprice;

}

r.close();

System.out.println("Report on the day is");

System.out.println(nA+" "+Aprice+" "+nB+" "+Bprice+" "+totalMoney);

BufferedWriter b=new BufferedWriter(new FileWriter("SaleInMonth_2016_06.txt",true));

int day=20;

b.write(day+" "+nA+" "+Aprice+" "+nB+" "+Bprice+" ");

b.close();

}

public static void    monthreport() ()throws Exception

{

}

public static void    yearreport() ()throws Exception

{

}

}

Explanation / Answer

//.h file code:

#include <string>
#include <vector>
#include <iostream>
#include <stdexcept>

class HelloWorld
{
static void main(std::vector<std::wstring> &args) throw(std::exception);
public:
static void saleproduct(Scanner *s) throw(std::exception);
static void dayreport() throw(std::exception);
static void monthreport() throw(std::exception);
static void yearreport() throw(std::exception);
};

//.cpp file code:

void HelloWorld::main(std::vector<std::wstring> &args) throw(std::exception)
{
int ch;
Scanner *s = new Scanner(System::in);
while (true)
{
   std::wcout << std::wstring(L"Menu") << std::endl;
   std::wcout << std::wstring(L"1. Sale Product") << std::endl;
   std::wcout << std::wstring(L"2. Ending day sale report") << std::endl;
   std::wcout << std::wstring(L"3. Ending month sale report") << std::endl;
   std::wcout << std::wstring(L"4. Ending year sale report") << std::endl;
   std::wcout << std::wstring(L"0.Exit") << std::endl;
   std::wcout << std::wstring(L"Enter your choice") << std::endl;
   ch = s->nextInt();
   if (ch == 1)
   {
   saleproduct(s);
   }
   else if (ch == 2)
   {
   dayreport();
   }
   else if (ch == 3)
   {
   monthreport();
   }
   else if (ch == 4)
   {
   yearreport();
   }
   else
   {
   exit(0);
   }
}
}

void HelloWorld::saleproduct(Scanner *s) throw(std::exception)
{
std::wstring tno;
int nA, nB, ch;
double Aprice, Bprice;
double amt;
FileWriter tempVar(new File(L"Sale_2016_07_20.txt"));
BufferedWriter *b = new BufferedWriter(&tempVar);
std::wcout << std::wstring(L"Sale report") << std::endl;
do
{
std::wcout << std::wstring(L"Enter transaction number") << std::endl;
tno = s->next();
std::wcout << std::wstring(L"Enter number of Model A units sold:") << std::endl;
nA = s->nextInt();
std::wcout << std::wstring(L"Enter the price of model A unit:") << std::endl;
Aprice = s->nextDouble();
std::wcout << std::wstring(L"Enter number of Model B units sold:") << std::endl;
nB = s->nextInt();
std::wcout << std::wstring(L"Enter the price of model B unit:") << std::endl;
Bprice = s->nextDouble();
std::wcout << std::wstring(L"Enter the amount paid of customer") << std::endl;
amt = s->nextDouble();
std::wcout << tno << std::wstring(L" ") << nA << std::wstring(L" ") << Aprice << std::wstring(L" ") << nB << std::wstring(L" ") << Bprice << std::wstring(L" ") << amt << std::wstring(L" ") << std::endl;
b->write(tno + std::wstring(L" ") + nA + std::wstring(L" ") + Aprice + std::wstring(L" ") + nB + std::wstring(L" ") + Bprice + std::wstring(L" "));
std::wcout << std::wstring(L"Do u want to enter another trnscation details:") << std::endl;
ch = s->nextInt();
}while (ch == 1);
delete b;
}

void HelloWorld::dayreport() throw(std::exception)
{
std::wstring saleline;
std::vector<std::wstring> temp;
int nA = 0;
int nB = 0;
double Aprice = 0;
double Bprice = 0;
int t1, t2;
double t3, t4;
double totalMoney = 0;
FileReader tempVar(L"Sale_2016_07_20.txt");
BufferedReader *r = new BufferedReader(&tempVar);
while ((saleline = r->readLine()) != L"")
{
//JAVA TO C++ CONVERTER TODO TASK: There is no direct native C++ equivalent to the Java String 'split' method:
temp = saleline.split(L" ");
t1 = std::stoi(temp[1]);
t2 = std::stoi(temp[3]);
t3 = std::stod(temp[2]);
t4 = std::stod(temp[4]);
nA = nA + t1;
nB = nB + t2;
Aprice += t1*t3;
Bprice += t2*t4;
totalMoney += Aprice + Bprice;
}
delete r;
std::wcout << std::wstring(L"Report on the day is") << std::endl;
std::wcout << nA << std::wstring(L" ") << Aprice << std::wstring(L" ") << nB << std::wstring(L" ") << Bprice << std::wstring(L" ") << totalMoney << std::endl;
FileWriter tempVar2(L"SaleInMonth_2016_06.txt",true);
BufferedWriter *b = new BufferedWriter(&tempVar2);
int day = 20;
b->write(std::to_wstring(day) + std::wstring(L" ") + nA + std::wstring(L" ") + Aprice + std::wstring(L" ") + nB + std::wstring(L" ") + Bprice + std::wstring(L" "));
delete b;
}

void HelloWorld::monthreport() throw(std::exception)
{
}

void HelloWorld::yearreport() throw(std::exception)
{
}

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