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// ConsoleApplication1.cpp : Defines the entry point for the console application.
//
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
// Function prototypes
void ProcessAccounts(std::ifstream &file, std::ofstream &file1, double);
void PrintFileContents(std::ifstream &file);
std::ifstream GetInputFile(std::string);
std::ofstream GetOutputFile(std::string);
void SetInputStreamPos(std::ifstream &, int);
void SetOutputStreamPos(std::ofstream &, int);
double roundHundreths( const double x );
//[BEGIN MAIN]
int main()
{
std::string wholeFile;
std::string inputFileName;
std::string outputFileName;
double interestRate;
std::cout << "Enter an input filename: ";
std::cin >> inputFileName;
std::cout << "Enter an output filename: ";
std::cin >> outputFileName;
std::cout << "Enter an interest rate (%): ";
std::cin >> interestRate;
std::cout << std::endl << std::endl;
std::ifstream ifile = GetInputFile(inputFileName);
std::ofstream ofile = GetOutputFile(outputFileName);
std::cout << "Current account status:" << std::endl;
PrintFileContents(ifile);
std::cout << std::endl;
std::cout << "SetInputStreamPos(ifile, 0):" << std::endl << std::endl;
SetInputStreamPos(ifile, 0);
PrintFileContents(ifile);
std::cout << std::endl << "Test 1 - Did it work?" << std::endl << std::endl;
std::cout << "Processing accounts...";
ProcessAccounts(ifile, ofile, interestRate);
std::cout << "DONE!" << std::endl;
std::cout << "Closing the files...";
ifile.close();
ofile.close();
std::cout << "DONE!" << std::endl << std::endl;
ifile = GetInputFile(outputFileName);
std::cout << "New account status:" << std::endl;
PrintFileContents(ifile);
std::cout << std::endl << "Done printing new status!." << std::endl;
std::cout << "Test 2 - 5: Are the 4 lines correct?" << std::endl;
ifile.close();
return 0;
}
void ProcessAccounts(std::ifstream &ifile, std::ofstream &ofile, double rate)
{
double save; //Saving's account variable
std::string name; //String used to store name
double credit; //Credit account variable
while (ifile >> name >> save >> credit) //While the data is being read in from ifile
{
if (save >= 0) //If the savings variable is greater than or equal to zero
{
double diff = save; //Assign the value of the value of the savings account to the variable 'diff'
diff = diff*(1+(rate/100)); //Multiply diff by (100+the interest rate)/100
save = diff; //Assign save the value of diff
credit = credit *(1+(rate/100)); //Multiply the credit by (100+the interest rate)/100
credit = roundHundreths(credit); //Rounds the hundreths digit up or down (if it is >=.05 or less than .05, respectively)
save = roundHundreths(save); //Rounds the hundreths digit up or down (if it is >=.05 or less than .05, respectively)
} //End if
else if ((credit > save)&&(save < 0)) //Otherwise, if the credit is greater than the savings and the savings are less than zero
{
double diff2= credit-save; //Assign diff2 to positive difference between the credit and the save variables
diff2=diff2 * (1+(rate/100)); //Multiply diff2 by (100+the interest rate)/100
save = 0; //Set save to zero
credit=diff2; //Assign credit to the value of diff
credit = roundHundreths(credit); //Rounds the hundreths digit up or down (if it is >=.05 or less than .05, respectively)
save = roundHundreths(save); //Rounds the hundreths digit up or down (if it is >=.05 or less than .05, respectively)
} //End if
ofile << name <<std::setprecision(2) << std::fixed << save << std::setprecision(2) << std::fixed <<credit << std::endl; //Send output to ofile in this format
} //End while
} //nd ProcessAccounts
void PrintFileContents(std::ifstream &str)
{
std::string name; //Account name variable
double saving; //Savings variable
double credit; //Credit variable
std::cout << std::left << std::setw(10) <<"Name";
std::cout << std::setw(10) << "Savings" << "Credit" << std::endl << std::fixed << std::showpoint; //Output a "Name", "Savings" and "Credits" column
while (str >> name >> saving >> credit) //While there is an input from the file in this form
{
if(saving < 0) //If the value in the savings variable is less than zero
{
double newsaving = - saving; //Assign newsaving to the negative value of the savings value
std::cout << std::setw(10) << name << "-$" << std::setw(8) << std::fixed << std::setprecision(2) << newsaving << "$" << std::fixed << std::setprecision(2) << std::setw(0) << credit << std::endl; //Output the values from the file
} //End if
std::cout << std::setw(11) <<name <<"$" << std::setw(8) <<std::fixed << std::setprecision(2) << saving << "$" << std::fixed << std::setprecision(2) << std::setw(0) << credit << std::endl; //Output the values from the file
} //End while
} //End PrintFileContents
std::ifstream GetInputFile(std::string filename)
{
// Open the file named filename
// Make sure it exists
// Return it as an input file stream
// Put your code here
std::ifstream Name(filename); //ifstream constructor opens file
if (!Name) //If such a file doesn't exist
{
std::cerr << "File couldn't be opened" << std::endl; //Output error message
exit(1); //Terminate program exectution
} //End if
return Name; //Return Name to main
}
std::ofstream GetOutputFile(std::string filename)
{
std::ofstream Name(filename); //ofstream constructor opens file
if (!Name) //If file doesn't exist
{
std::cerr << "File couldn't be opened" << std::endl; //Output error message
exit(1); //Terminate program execution
} //End if
return Name; //Return Name to main
}
void SetInputStreamPos(std::ifstream &str, int pos)
{
str.seekg(pos,std::ios::beg); //Set the cursor at 'pos' bytes from the beginning in the input stream
}
void SetOutputStreamPos(std::ofstream &str, int pos)
{
str.seekp(pos, std::ios::beg); //Set the cursor at 'pos' bytes from the beginning in the output strea
}
double roundHundreths( const double x )
{
double result = x * 100.0 + 0.5; //Moving number 2 places right and trying to round
result = static_cast<int>( result ); //Flooring
result /= 100.0; //Moving number 2 places left
return result;
}
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