For loop that allows for variables to overwrite each other - c++

Question

My question is how do I add onto my for loop so that when it does its multiple iterations, the variables will overwrite each other?
I am trying to take an input text file with three shares like so:
*Google (GOOG)
522.01 2 100
520.66 1.5 80
Apple (AAPL)
389.27 2 150
401.82 1.8 150
Microsoft (MSFT)
25.06 2.5 100
25.07 2 80*
Then later print/write it onto an output text file.
Now when it runs its iteration 3 times, It only displays stock 1 and its correct numbers, but then wrong numbers and no name for the others. So how would I go about making it so the next iterations will overwrite and print another set of answers?
below is the for section code I have:
for (int x = 1; x <= 3; x++) // for loop to run this part of program 3 times
{
getline(dataIn, stockName);//Gets the whole first line
dataIn >> buyingAMT;//These just store whatever is in the line before every space, and sets it with a name
dataIn >> buyingComm;//So like it takes the characters leading up to the first space and stores it as buyingAMT.
dataIn >> numberBought;
dataIn >> sellingAMT;
dataIn >> sellingComm;
dataIn >> numberSold;
//writing to a file
buyingComm = buyingComm * buyingAMT;//Mathematical Calculations
buyingAMT = buyingAMT * numberBought;
sellingComm = (sellingComm / 100) * numberSold;
sellingComm = sellingComm * sellingAMT;
sellingAMT = sellingAMT * numberSold;
profit = (sellingAMT - sellingComm) - (buyingAMT + buyingComm);
//Displaying the calculated answers
fout << setw(20) << left << stockName;
fout << setprecision(2) << fixed << setw(15) << right << buyingAMT;
fout << setprecision(2) << fixed << setw(15) << right << buyingComm;
fout << setprecision(2) << fixed << setw(15) << right << sellingAMT;
fout << setprecision(2) << fixed << setw(15) << right << sellingComm;
fout << setprecision(2) << fixed << setw(15) << right << profit << endl;
//Storing the results into the overall variables to be used later
/*totalBuyingAMT += buyingAMT;
totalBuyingComm += buyingComm;
totalSellingAMT += sellingAMT;
totalSellingComm += sellingComm;
grandProfit += profit;
*/
}
getline(dataIn, junk);//Cleans the remaining unread data
dataIn.close();//closes the input file, so it cant be read any longer
fout.close();
cout << "congrats you are either now screwed or rich!";
return 1;
}
what I get as output
what i need to get

Answer 1

Variables as long as they are not const can always be re-written or copied. What it looks like from your code there is an issue with how your extracting the text.
dataIn >> buyingAMT;//These just store whatever is in the line before every space, and sets it with a name
dataIn >> buyingComm;//So like it takes the characters leading up to the first space and stores it as buyingAMT.
dataIn >> numberBought;
dataIn >> sellingAMT;
dataIn >> sellingComm;
dataIn >> numberSold;
So what kind of types are dataIn and the other variables here? It seems as though your not splitting the text correctly or don't have a way to do that from dataIn.
This is a small example where one line is taken from stdin (although it can be any stream)
#include <iostream>
#include <string>
int main() {
int i;
std::string input;
for(i=0;i<3;i++)
{
std::cout << "Please give me some input:";
std::cin >> input;
std::cout << "You gave me:" << input << std::endl;
}
}
ofstream fout;//data type used to write the data taken from input file and put it on output file
fout.open(output_File_Name);
if (fout.fail())
{
fout << "Input file not found: " << output_File_Name << endl;
system("pause");
return 0;
}
fout << setw(20) << left;//Setting the labels
fout << "STOCK";
fout << setw(15) << right;
fout << "BUYING AMT";
fout << setw(15) << right;
fout << "BUYING COMM";
fout << setw(15) << right;
fout << "SELLING AMT";
fout << setw(15) << right;
fout << "SELLING COMM";
fout << setw(15) << right;
fout << "PROFIT" << endl;