C++ Data files

[Norbert43W]

Hi everyone, I am a student at MCC in CT and i need help getting a file named rocket1.dat to be read and then i need to determine the time at which that rocket is at its peak altitude, my HW questions read as follows ” Assume that the rocket1.dat file contains an inital line that specifies the number of actual lines of data that follow. Write a program that reads each of these dat and determines the time at which the rocket begins falling back to Earth. “
thank you

#include “stdafx.h”

#include
#include
#include

using namespace std;

int main()
{
//Declare and initialize objects

int number_of_items, k;
double time, velocity, acceleration, altitude,
previous_time, previous_altitude;
string filename;
ifstream rocket1;
ofstream report;

cout << "Enter name of the input file ";
cin >> filename;

rocket1.open(filename.c_str());

if(rocket1.fail())
{
cerr << "Error opening input file " << filename << endl;
exit (1);
}

report.open (“rocket1.dat”);

rocket1 >> number_of_items;

rocket1 >> time >> altitude;

for (k = 1; k < number_of_items; k++)
{
rocket1 >> time >> altitude ;

if (!(rocket1 >= number_of_items) || number_of_items == 0)
{
cout << "no valid data in file" << filename << endl;
exit (1);
}

while (altitude>=previous_altitude &&!rocket1.eof())
{
previous_altitude = altitude;
previous_time= time;
rocket1 >> time >> altitude >> velocity >> acceleration;
}

if (altitude < previous_altitude)
cout << "time at which the rocket begins to fall is between "
<< previous_time << " seconds and " << time << "seconds n";else
cout << "no decrease in altiutde detected in data file. n";}
rocket1.close();
report.close();

return 0;

}

[GWILouisaxwzkla]

Could you post your data file?

[Author]

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