help with reading a file

[mfried41]

Hi! i need help writing a program to read in a file to my program. the file looks like this
12
283 20.00 5
156 50.00 20
385 15.00 20
739 100.00 20
555 50.00 50
412 100.00 1
904 150.00 8
716 75.00 3
872 35.00 70
202 20.00 50
194 200.00 10
810 40.00 4

im using fstream to to open it. I have been trying to use for loops to read it, but i cant get it to work properly. the first column is employee data and the second is how much they earn and the last is how much overtime. Please help!

[Lowest0ne]

I'm guessing that 12 is the amount of employees there are. You can make the code a little more streamlined using pointers, but this will probably suffice:

(overtime is an int?)

const int SIZE = 100;
int amount, data[SIZE], overtime[SIZE];
double wage[SIZE];
ifstream inFile;

// open the file

inFile >> amount;
for (int i = 0; i < amount; i++){
  inFile >> data[i] >> wage[i] >> overtime[i];
}

Those extraction operators look backwards, haven't quite put that into muscle memory...

[ui uiho]

remember to close the file, along with actually opening the file.
infile.open("FILE LOCATION HERE");
infile.close();
by the way, wages was never actually declared in that last segment of text, if you were just coping it.

[mfried41]

thanks alot! the problem is. 12 is the amount of lines to be read. like for the first number im trying to say there are 283 employees making 20.00 with 5 hrs of overtime.

[Subzero030201]

Here is another way.

#include <fstream>
#include <iostream>
using namespace std;
int main()
{
ifstream inFile;
int amount;
inFile.open("file.txt");
inFile >> amount;
int *data = new int[amount];
int *overtime = new int[amount];
double *wage = new double[amount];
for (int i = 0; i < amount; i++)
{
	  inFile >> data[i] >> wage[i] >> overtime[i];
		  cout <<"|Data : "<<data[i] <<" | Wage : "<< wage[i] <<" | Overtime Hours: "<< overtime[i]<<" |"<<endl;
	  cout <<"-------------------------------------------------------------------------"<<endl;
}
delete[]data;
delete[]overtime;
delete[]wage;
return 0;
}

or

#include <fstream>
#include <vector>
#include <iostream>
using namespace std;
int main()
{
double dtemp;
int itemp;
vector<int> data;
vector<int> overtime;
vector<double> wage;
ifstream inFile;
int amount;
inFile.open("file.txt");
inFile >> amount;
for (int i = 0; i < amount; i++)
{
	inFile>> itemp;
	data.push_back(itemp);
	inFile>> dtemp;
	wage.push_back(dtemp);
	inFile>> itemp;
	overtime.push_back(itemp);
		  cout <<"|Data : "<<data[i] <<" | Wage : "<< wage[i] <<" | Overtime Hours: "<< overtime[i]<<" |"<<endl;
	  cout <<"-------------------------------------------------------------------------"<<endl;
}

return 0;
}

or

#include <fstream>
#include <iostream>
using namespace std;
struct info
{
int data;
int overtime;
double wage;


};
int main()
{
ifstream inFile;
int amount;
inFile.open("file.txt");
inFile >> amount;
struct info *sinfo = new info[amount];

for (int i = 0; i < amount; i++)
{
	  inFile >> sinfo[i].data >> sinfo[i].wage >> sinfo[i].overtime;
		  cout <<"|Data : "<<sinfo[i].data <<" | Wage : "<< sinfo[i].wage <<" | Overtime Hours: "<< sinfo[i].overtime<<" |"<<endl;
	  cout <<"-------------------------------------------------------------------------"<<endl;
}
delete [] sinfo;
return 0;
}

[Lowest0ne]

thanks alot! the problem is. 12 is the amount of lines to be read. like for the first number im trying to say there are 283 employees making 20.00 with 5 hrs of overtime.

You don't need to worry about line breaks for this, the extractor will take care of this for you. Just start the extraction like Subzero030201 or I have: inFile >> amount. Then you can loop that amount of times.