Need help with reading data from a file while loop
We just started class today and im having major memory blockage when it comes to programming even though the last class was only a few months ago...
Problem description: The text file DJI.txt contains the information of a stock market index --
Dow Jones Industrial Average Index (DJI for short) -- for a continuous time
in year 2008. Each line contains the date and the DJI's value on that day.
For the format of the file, please view DJI.txt.
Please write a program that reads DJI values stored in the data file DJI.txt,
and finds out the date with highest DJI value during this period stored in the file.
*/
#include <string>
#include <iostream>
#include <fstream>
using namespace std;
int main( )
{
const string inputFile = "/var/www/html/programs2/2170_1_5/dataFiles/DJI.txt";
ifstream ifs; //an input file stream
int day; //Today's day
int maxDay; //The day of the date with max. DJI
string month; //Today's month
string maxMonth; //The month of the date with max. DJI
double maxDJI; //The max. DJI value got so far.
double dji; //Today's DJI
ifs.open( inputFile.c_str() ); //open the file
//INSERT WHILE LOOP HERE
// this is what i have come up with so far
ifs>>month>>day>>dji;
while (ifs)
{
if (maxDJI > dji)
{
maxDJI=dji;
maxDay=day;
maxMonth=month;
}
ifs>>month>>day>>dji;
}
ifs.close(); //close the input file
cout << "DJI is highest on " << maxMonth << " " << maxDay << " with " << maxDJI << endl;
return 0;
}
and here is the text file
May 28 : 12594.0303
May 29 : 12593.8701
May 30 : 12638.3203
June 2 : 12503.8203
June 3 : 12402.8496
June 4 : 12390.4805
June 5 : 12604.4502
June 6 : 12209.8096
Problem description: The text file DJI.txt contains the information of a stock market index --
Dow Jones Industrial Average Index (DJI for short) -- for a continuous time
in year 2008. Each line contains the date and the DJI's value on that day.
For the format of the file, please view DJI.txt.
Please write a program that reads DJI values stored in the data file DJI.txt,
and finds out the date with highest DJI value during this period stored in the file.
*/
#include <string>
#include <iostream>
#include <fstream>
using namespace std;
int main( )
{
const string inputFile = "/var/www/html/programs2/2170_1_5/dataFiles/DJI.txt";
ifstream ifs; //an input file stream
int day; //Today's day
int maxDay; //The day of the date with max. DJI
string month; //Today's month
string maxMonth; //The month of the date with max. DJI
double maxDJI; //The max. DJI value got so far.
double dji; //Today's DJI
ifs.open( inputFile.c_str() ); //open the file
//INSERT WHILE LOOP HERE
// this is what i have come up with so far
ifs>>month>>day>>dji;
while (ifs)
{
if (maxDJI > dji)
{
maxDJI=dji;
maxDay=day;
maxMonth=month;
}
ifs>>month>>day>>dji;
}
ifs.close(); //close the input file
cout << "DJI is highest on " << maxMonth << " " << maxDay << " with " << maxDJI << endl;
return 0;
}
and here is the text file
May 28 : 12594.0303
May 29 : 12593.8701
May 30 : 12638.3203
June 2 : 12503.8203
June 3 : 12402.8496
June 4 : 12390.4805
June 5 : 12604.4502
June 6 : 12209.8096
you'll want to run the while() loop as far as you have not reached the end of the DJI.txt file, right?
i think fstream can check which line of the external file you are at the moment.
i think fstream can check which line of the external file you are at the moment.
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