Requirement: Correct the following program so that it will write the same number

Question

Requirement: Correct the following program so that it will write the same numbers to a file as well as, optionally, display the numbers on the screen.

The original program is as follows:

#include <QtCore/QCoreApplication>

#include <iostream>

#include <cstdlib>

#include <iomanip>

#include <fstream>

#include <ctime>

using namespace std;

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

srand(time(NULL));

  int num;

ofstream theWave;

ifstream inputStream;

theWave.open("com4:");

  for(int i = 0; i < 10; i++)

{

num = rand() % 1000;

cout<<num<<endl;

theWave<<num<<endl;

}

theWave.close();

inputStream.open("junk2.dat");

  if(inputStream.fail())

{

inputStream.clear();

cout<<"That file does not exist!!!"<<endl;

inputStream.close();

exit(0);

}

  int count = 0;

  while(inputStream >> num)

cout<<"just read item "<<count++<<": "<<num<<endl;

inputStream.close();

cout<<"The end!"<<endl;

  return a.exec();

}

Explanation / Answer

// additionally added code is in bold

#include <QtCore/QCoreApplication>

#include <iostream>

#include <cstdlib>

#include <iomanip>

#include <fstream>

#include <ctime>

using namespace std;

int main(int argc, char *argv[])

{

QCoreApplication a(argc, argv);

srand(time(NULL));

int num;

ofstream theWave;

ifstream inputStream;

theWave.open("com4:");

for(int i = 0; i < 10; i++)

{

num = rand() % 1000;

cout<<num<<endl;

theWave<<num<<endl;

}

theWave.close();

inputStream.open("junk2.dat");

theWave.open("out.dat");

if(inputStream.fail())

{

inputStream.clear();

cout<<"That file does not exist!!!"<<endl;

inputStream.close();

exit(0);

}

int count = 0;

while(inputStream >> num){

cout<<"just read item "<<count++<<": "<<num<<endl;

theWave<<"just read item "<<count++<<": "<<num<<endl;

}

inputStream.close();

cout<<"The end!"<<endl;

theWave<<"The end!"<<endl;

theWave.close();

return a.exec();

}

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.