I used a basic input file to input 3 rows of sales data like 300 300 300. I must use link lists and pointers and at the same time use a class to input my data and output it. I need a average fuction that will add the code and do a average,and output everything to the oupt file. I have ran into a block any help would be appreciated.
Code:#include <iostream> #include <cstddef> #include <iomanip> #include <fstream> using namespace std; class TotalSales { public: /************************************************************************************* overloaded operators +, -, /, and * declared to calculate 2 numbers ***********************************************************************************/ friend TotalSales operator +(const TotalSales& sale1, const TotalSales& sale2); friend TotalSales operator -(const TotalSales& sale1, const TotalSales& sale2); friend TotalSales operator *(const TotalSales& sale1, const TotalSales& sale2); friend TotalSales operator /(const TotalSales& sale1, int denominator); /************************************************************************************* Overloaded operators << and >>, inputs and outputs number totals ***********************************************************************************/ friend istream& operator >>(istream& ins, TotalSales& sale1); friend ostream& operator <<(ostream& outs, TotalSales& sale2); /************************************************************************************* Declared constructor that intializes the member variable and intializes it to zero ***********************************************************************************/ TotalSales(double jan, double feb, double mar, double totals1);//constructor intializes member variables TotalSales (); //constructor intialzes member variables to zero /************************************************************************************* Accessor function returns jantotals, febtotals. martotals, totals. ***********************************************************************************/ double get_jantotals(); double get_febtotals(); double get_martotals(); double get_totals(); /************************************************************************************* Declared the member variables in private ***********************************************************************************/ private: double jantotals; double martotals; double febtotals; double totals; double average(); }; int quarterly(); typedef struct Node* lref, lnode; typedef struct Node { double data; lref next; }Node; total_average(lref& head); int main() { /****************************************************************************** outputs the file ************************************************************************/ ifstream fins; ofstream fout; /********************************************************************* gives the array a variable name ******************************************************************/ lref head; head = NULL; lref end; lref tail; end = new Node; if (head == NULL) { head = end; } else { tail= end; end->next = new Node; } //int array_size; //lref size; //size = new Node[array_size]; TotalSales amount; //************ declares the objects being used with the class fins.open("ins.txt"); //opens the input file if (fins.fail()) { cout <<"Input file failed." << endl; exit(1); } fout.open("outs.txt"); //opens the output file if (fout.fail()) // will output a error if the output file fails { cout << "Output file failed." << endl; exit(1); } /********************************************************** gives the decimal point and sets it to 2 ******************************************************/ fout.setf(ios::fixed); fout.setf(ios::showpoint); fout.precision(2); /*********************************************************** outputs the average and total info to the output file for display **************************************************************/ fout << "January" <<setw(15) << "February" << setw(15) << "March" << setw(15) << "Average" << endl; do { double average(lref head); fins >> head->data; fout << head->data; } while (! fins.eof()); fins.close(); fout.close(); //closes the output file delete head, end, tail; system("pause"); // pauses the screen after the program runs return 0; }
