Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 2 years ago.
Improve this question
We are supposed to make a retail sales cashier but I just can't figure out the loops at all. We have only learned simple selection and repetition statements so far and I know that's all I need but I just can't seem to figure it out.
Project Overview
Starter Code:
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double cashDrawer = 500.00;
int productID = 0;
int quantity = 0;
double price = 0.0;
double subtotal = 0.0;
double salesTax = 0.0;
double totalSale = 0.0;
int anotherSale = 1;
// Loop for repeat sales
// Enter the first Product ID for the first sale (-1 to exit)
// Main loop for each sale
// Switch statement to determine the price, and calculate sales tax, if any, for the item.
// Get next Product ID
// Print properly formatted output for each sale
// Another sale?
// Display how much is in the cash drawer at the end
}
What I have so far:
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double cashDrawer = 500.00;
int productID = 0;
int quantity = 0;
double price = 0.0;
double subTotal = 0.0; // for receipt purposes
double salesTax = 0.0; // for receipt purposes
double totalSale = 0.0; // for receipt purposes
int anotherSale = 1;
double taxRate = 0.075; // default tax rate
// Loop for repeat sales
while ()
{
// Enter the first Product ID for the first sale (-1 to exit)
cout << "Enter the first Product ID: ";
cin >> productID;
// Main loop for each sale
while (productID > 0)
{
// Switch statement to determine the price, and calculate sales tax, if any, for the item.
switch (productID)
{
case 101:
price = 65.00;
taxRate = 0.075;
break;
case 102:
price = 12.50;
taxRate = 0;
break;
case 103:
price = 24.50;
taxRate = 0.00;
break;
case 104:
price = 38.75;
taxRate = 0.075;
break;
case 105:
price = 17.80;
taxRate = 0.075;
break;
case 106:
price = 16.50;
taxRate = 0;
break;
case 107:
price = 42.85;
taxRate = 0.075;
break;
case 108:
price = 32.99;
taxRate = 0.075;
break;
case 109:
price = 28.75;
taxRate = 0.075;
break;
case 110:
price = 51.55;
taxRate = 0;
break;
default:
cout << "INVALID PRODUCT ID: Product ID not found." << endl;
}
cout << "Enter the quantity: ";
cin >> quantity;
subTotal += price * quantity;
salesTax += price * quantity * taxRate;
totalSale = subTotal + salesTax;
// Get next Product ID
cout << "Enter the next Product ID: ";
cin >> productID;
}
// Print properly formatted output for each sale
// Another sale?
}
// Display how much is in the cash drawer at the end
}
Any help is appreciated, thank you guys in advance.
The basic aspect of a loop statement is to repeat the same set of instructions until a specified condition is met. You have successfully figured it out for the inner loop of your code where you are checking if productID>0. You need to do the same for the outer loop and impose a similar condition on anotherSale i.e. while(anotherSale!=0). Every time the inner loop finish, just ask the user for the value of anotherSale; if the user enters 0, the loop should break.
I have been trying to write a simple code in C++ to calculate CGPA. It is a practice code. There is no error in code when I start to build. But it is not running.
I am using codeblocks. I have checked everything. but can not find any problems in it.
#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
int g,h,i,a=0, grade[g],hour[h];
char course[10];
float z=0,sum =0, result=0, totalhour=0;
cout<<"How Many Course's do you want to calculate for CGPA: ";
cin>> a;
cout<<endl;
cout<<"Please Enter your Course name, Credit hour & Grade point of the your course"<<endl;
for(i=1;i<=a;i++)
{
cout<<i<<". no Course name: ";
cin>>course[i];
cout<<"-----";
cout<<"Credit Hour: ";
cin>>hour[h];
cout<<"-----";
cout<<"Grade point: ";
cin>>grade[g];
cout<<"\n";
}
for (i=1; i<=a;i++)
{
cout<<i<<".no Course----";
z= grade[g]*hour[h];
cout<<"Grade point X Credit Hour = "<<grade[g]<<" X "<<hour[h]<<" = "<<z<<endl;
sum = sum+z;
totalhour= totalhour+hour[h];
}
result = sum / totalhour;
cout<<"Your total Credit hour Completed is : "<<totalhour<<endl;
cout<<"----Your Total CGPA is -------- = "<<result<<endl;
getch();
return 0;
}
You have some problems in your code:
What happens if user input is larger then 10? you assume it will be smaller (you will get undefined behavior since the array size is 10, and your for loop runs until user input)
int g,h,i,a=0, grade[g],hour[h]; - what is the size of grade and hour? you can not "dynamically" give them a size. You must tell what size they are when you declare them, unless you use dynamic containers such as std::vector.
I am working on an assignment for my C++ class (the assignment is pasted at the bottom of my test.cpp file). I implemented everything correctly up until the last requirement (using a sort_name function, sort the student structures based on their last names and for each student, sort the classes he or she is taking based on class title. Display the sorted list of students using the display function by calling it from main). I have attempted to implement my sort function by sorting just the students at first, but I keep getting errors and getting stuck(The current error is: Unhandled exception at 0x777a15de in 839a4 Vasilkovskiy.exe: 0xC00000FD: Stack overflow). Any help would be greatly appreciated.
NOTE: I understand that vectors are much more useful for sorting, but our professor does not want us to use them.
#include <iostream>
#include <string>
#include <stdio.h>
#include <string.h>
#include <iomanip>
using namespace std;
struct Class
{
string title;
int units;
char grade;
};
struct Student
{
string name;
double gpa;
Class classes[500];
};
int const SIZE = 50;
void initStudent(Student[], int);
void readStudent(Student[], int, int&);
void gpaCalculate(Student&);
void print(Student[], int);
void sort_name(Student[], int);
void swapStus(Student&, Student&);
void stringToCharArray(string, char[]);
int locactionOfFirstName(Student[], int, int);
int main()
{
int numberOfStudents = 0;
Student students[SIZE];
initStudent(students, SIZE);
readStudent(students, SIZE, numberOfStudents);
for(int i = 0; students[i].name != "";i++)
gpaCalculate(students[i]);
print(students, numberOfStudents);
sort_name(students, numberOfStudents);
system("pause");
return 0;
}
void initStudent(Student st[], int s)
{
for(int i = 0; i < s; i++)
{
st[i].gpa = 0.0;
}
}
void readStudent(Student st[], int s, int& nStus)
{
for(int i = 0; i < s; i++)
{
string tmpName;
cout << "Enter student name: ";
getline(cin, tmpName);
if(tmpName == "")
break;
st[i].name = tmpName;
nStus++;
for(int j = 0; j < 500; j++)
{
string tmpTitle;
cout << "Enter class title: ";
getline(cin, tmpTitle);
if (tmpTitle == "")
break;
st[i].classes[j].title = tmpTitle;
cout << "Enter units for " << st[i].classes[j].title << ": " ;
cin >> st[i].classes[j].units;
cout << "Enter grade for " << st[i].classes[j].title << ": " ;
cin >> st[i].classes[j].grade;
cin.ignore();
}
}
}
void gpaCalculate (Student& s)
{
double unitsByPoints = 0;
double totalUnits = 0;
for (int i = 0; s.classes[i].title != ""; i++)
{
int grade = 0;
char ltrGrade = s.classes[i].grade;
switch (ltrGrade)
{
case 'A':
grade = 4;
break;
case 'B':
grade = 3;
break;
case 'C':
grade = 2;
break;
case 'D':
grade = 1;
break;
case 'F':
grade = 0;
break;
}
unitsByPoints += s.classes[i].units*grade;
totalUnits += s.classes[i].units;
}
s.gpa = unitsByPoints/totalUnits;
}
void print(Student st[], int size)
{
for (int i = 0; i < size; i++)
{
cout << "Student's name: " << st[i].name << endl;
for (int j = 0; st[i].classes[j].title != ""; j++)
{
cout << st[i].classes[j].title << "," << st[i].classes[j].grade << endl;
}
cout << fixed << setprecision(2) << "GPA: " << st[i].gpa << endl;
}
}
//void sort_name(Student st[], int size)
//{
// for(int i = 0; i < size; i++)
// {
// int smallest = locactionOfFirstName(st, i, size);
// swapStus(st[i], st[smallest]);
// }
//
//}
void swapStus(Student& s1, Student& s2)
{
Student tempStu;
tempStu = s1;
s1 = s2;
s2 = tempStu;
}
void stringToCharArray(string s, char c[])
{
char tempCharArray[50];
for(int i = 0; s[i] != '\n'; i++)
{
tempCharArray[i] = s[i];
}
char * space = strstr(tempCharArray," ");
strcpy(c,space);
}
bool lastNameCompare(string l1, string l2)
{
char lName1[50];
char lName2[50];
stringToCharArray(l1, lName1);
stringToCharArray(l2, lName2);
return (strcmp(lName1, lName2) >=0);
}
int locactionOfFirstName(Student st[],int start, int size)
{
char lName1[50];
char lName2[50];
stringToCharArray(st[0].name, lName1);
int i;
for(i = start; i < size;)
{
stringToCharArray(st[i].name, lName2);
if(strcmp(lName1, lName2) >= 0 )
{
stringToCharArray(st[i].name, lName1);
}
}
return i;
}
void InsertItem(Student values[], int startIndex, int endIndex)
{
bool finished = false;
int current = endIndex;
bool moreToSearch = (current != startIndex);
while (moreToSearch && !finished)
{
if (lastNameCompare(values[current-1].name, values[current].name))
{
swapStus(values[current], values[current-1]);
current--;
moreToSearch = (current != startIndex);
}
else
finished = true;
}
}
void sort_name(Student values[], int numValues)
{
for (int count = 0; count < numValues; count++)
InsertItem(values, 0, count);
}
/*
Define a structure called Class (with uppercase C) with the following data:
title, units and grade.
Define a structure called Student with the following data:
name (full name), gpa, and classes which is an array of Class structures (all the classes the student has taken so far).
Write an initialize function that receives an array of Student structures and its size and sets the gpa of all to 0.0.
In main, create 50 Students and call the above function to initialize the gpa for all 50 Students to 0.0.
Then, pass the array of student structures and its size to a read function that will read student data from the user and store the entered data in the array of student structures. The user will enter student name followed by the class title, units and grade received for each class he or she has taken. When finished entering class information for a student, the user will just press Enter (an empty string) and to end entering more students, he or she will do the same for the student name.
Example:
Enter student name: Maria Gomez
Enter class title: English 101
Enter units for English 101: 3
Enter grade for English 101: A
Enter class title: Math 201
Enter units for Math 201: 4
Enter grade for Math 201: B
Enter class title: [User enters RETURN to indicate no more classes]
Enter student name: Kevin Duran
Enter class title: Poly Sci 101
Enter units for Poly Sci 101: 3
Enter grade for Poly Sci 101: A
Enter class title: Math 201
Enter units for Math 201: 4
Enter grade for Math 201: B
Enter class title: [User enters RETURN to indicate no more classes]
Enter student name: [User enters RETURN to indicate no more students]
Once all Studnets have been entered, pass each element of the array of Student structures (element by element) to a gpa function which will compute and return the gpa for each Student using the classes array within each Student structure which contains the units and grade for each class taken by the student. Store the gpa returned by the above function in the gpa member of the Student structures. GPA is calculated by multiplying the number of units for each class by the points received for that class, and then adding all these products together and dividing it by total number of units. The points received for a class is based on the grade: for A, it's 4; for B, it's 3; for C, it's 2; for D it's 1; and for F it's 0. For example, if a student has take 3 classes with 3, 4, and 3 units and has received A, B, and C for these classes, respectively, then, the GPA will be 3 x 4 + 4 x 3 + 3 x 2 / 10 = 3.0.
Print all students showing name, followed by all classes taken, the grade received and the gpa using a display function which receives the array and its size as parameters.
Then, using a sort_name function, sort the student structures based on their last names and for each student, sort the classes he or she is taking based on class title. Display the sorted list of students using the display function by calling it from main.
For example:
Kevn Duran
Poly Sci 101, A
Math 150, B
GPA: 3.0
Maria Gomez:
English 101, A
Math 201, C
GPA: 2.9
Robert Small
Comp Science 801, C
Comp Science 802, D
GPA: 1.9
Tom Wang
Comp Science 808, A
Comp Science 839, B
GPA: 3.5
Then, sort the students based on their GPA's using a sort_gpa function and print the list again using the display function.
Then, ask what to search for - name or gpa. If name is selected, read a student name from the user and, using a binary search function that takes the array, its size and the name to search for, finds the student and displays all of his or her information (name, gpa, units and list of classes taken).
Example:
Enter a student name: Robert Small
Robert Small:
Comp Science 801, C
Comp Science 802, B
GPA: 2.5
If GPA is selected, read a GPA and using another binary search find the student with the given GPA by passing the students array, its size and the GPA to search for. Display the name of the student with the specified GPA in main.
Example:
Enter GPA to search for: 2.5
Robert Small was found with the GPA of 2.5
If the name or GPA is not found, tell the user it was not found; e.g.: There was no student with a GPA of 2.5; or Robert Small was not found.
Then, pass the array of student atructures and the size to a stats function which will return the average of the GPA's of all students and through two reference parameters will output the student structures that have the minimum and maximum GPA's. Print the average GPA, as well as the names of the students who have the minimum and maximum GPA in main, like so:
Average GPA = 3.17
Robert Small has the minimum GPA of 2.5.
Tom Wang has the maximum GPA of 3.5.
Finally, read a maximum and minimum GPA from the user and pass the array of student structures and its size, as well as two other arrays of student structures of the same size to a function which will store all students with a GPA of above the minimum in the highGPA array and all those with a GPA below the maximum in the lowGPA array. Display the students stored in these two arrays by passing them each from main to the display function. In other words, the highlow function receives two uninitalized arrays of student structures and populates them based on the GPA criteria passed to it (minimum GPA and maximum GPA). Then, upon return to main, main passes each of these arrays to the display function to display them. For example, if the user enters 2.0 for the maximum GPA, the lowGPA array gets filled out with all those students who have a GPA of less than 2.0. Likewise, if the minimum GPA is 3.5, the highlow function populates the highGPA array with those students who have a GPA of 3.5 or higher.
Example:
Enter maximum GPA: 2.0
Enter minimum GPA: 3.5
Students with a GPA of lower than 2.0:
Robert Small 1.9
Students with a GPA of 3.5 or higher:
Tom Wang 3.5
When writing the highlow function, take advantage of the fact that the array elements are sorted based on the GPA, so to find all the students with a GPA of equal to or higher than the minimum GPA, it doesn't make sense to start from the first element in the array. Instead you can start from the midpoint. If the midpoint is lower than the minimum GPA, you can increment the index until the midpoint is no longer smaller and then all the GPA's from that point on will be larger and part of the high GPA's. For low GPA's of course, you'd want to start from the beginning of the array and compare and store each that's lower than the maximum until they are no longer lower.
Functions you must write for this assignment (in addition to main):
initialize, read, display, sort_name, sort_gpa, search-name, search_gpa, stats, highlow.
Upload your cpp and exe files using the Browse and Upload buttons below and click Finish once both have been uploaded to the site.*/
I debugged it for you.
The problem is in your stringToCharArray(string s, char c[]).
My index i arrived to 104 before getting "segmentation fault". Since all your strings have length 50 you are clearly going out of bounds.
Another problem is in srtstr that returns NULL, but this is related to the first problem.
A quick look to your sort_name and InsertItem didn't show up anything wrong, at least in the field of "segmentation error", since it's not so clear what you are trying to do, but at least you are performing the right index checks.
I am having an issue with this program. I need it to ask for a user id then ask for book code and then the cost of a book. An individual can enter an unknown number of books. the program needs to then calculate the individual students book total and then ask another student who does the same. the program must then display the grand totals and total number of books. I cant seem to figure out what to use to be able to keep track of the individual students entries. I would be able to do this from what I was reading about arrays. But we are not to that point yet. The professor wants us to do this with a loop. I am so lost, any help would be awesome.
#include <iostream>
#include <iomanip>
using namespace std;
int main ()
{
//Declare Variables.
int student_id;
char book_code;
float book_cost;
float tax_amount;
float book_subtotal;
const int SENTINEL = -9999;
const double TAX = .07;
float total_book_cost;
int number_books;
int total_books_sold;
double grand_total;
//Set Variables to Zero.
number_books = 0;
total_book_cost = 0.00;
grand_total = 0.00;
//Set Decimal to two places.
cout << fixed << showpoint;
cout << setprecision(2);
//Input Data
cout<<"Please enter your Student ID, then press enter."<<endl;
cin>>student_id;
while (student_id != SENTINEL){
cout<<"Please enter your Book Code, then press enter."<<endl;
cin>>book_code;
cout<<"Please enter the cost of the book, then press enter."<<endl;
cout<<"$"; cin>>book_cost;
tax_amount = book_cost * TAX;
book_subtotal = book_cost + tax_amount;
total_book_cost += book_subtotal;
number_books++;
cout<<"\tStudent Textbook Purchases Report"<<endl;
cout<<"********************************************"<<endl;
cout<<"Student"<<"\tBook"<<"\tBook"<<"\tTax"<<"\tBook"<<endl;
cout<<"Id"<<"\tCode"<<"\tCost"<<"\tAmount"<<"\tSubtotal"<<endl;
cout<<"--------------------------------------------"<<endl;
cout<<student_id<<setw(5)<<book_code<<setw(8)<<"$"<<book_cost<<
setw(3)<<"$"<<tax_amount<<setw(4)<<"$"<<book_subtotal<<endl;
cout<<endl;
cout<<"Total number of books purchased:"<<setw(8)<<number_books<<endl;
cout<<"Total books cost including tax:"<<setw(9)<<"$"<<total_book_cost<<endl;
cout<<"Please enter your Student ID, then press enter."<<endl;
cin>>student_id;
}
grand_total += total_book_cost;
total_books_sold += number_books;
cout<<"**************************************************"<<endl;
cout<<"Grand Totals:"<<endl;
cout<<"Total number of students who purchased books:"<<endl;
cout<<"Total number of books sold:"<<endl;
cout<<"Total cost of all books and taxes:"<<setw(9)<<"$"<<grand_total<<endl;
//Can put grand totals here
system("Pause");
return 0;
}
You could use the loop as this:
#include <iostream>
#include <iomanip>
using namespace std;
int main ()
{
//Set Decimal to two places.
cout << fixed << showpoint;
cout << setprecision(2);
int total_books_sold = 0;
double grand_total = 0.0;
const int SENTINEL = -9999;
int student_id = SENTINEL;
//Input Data
cout<<"Please enter your Student ID, then press enter."<<endl;
cin>>student_id;
while (student_id != SENTINEL){
double total_book_cost = 0.0;
int number_books = 0;
char book_code = '\0';
while (true)
{
cout<<"Please enter your Book Code, then press enter."<<endl;
cin>>book_code;
if (book_code == 'x')
break;
float book_cost;
cout<<"Please enter the cost of the book, then press enter."<<endl;
cout<<"$"; cin>>book_cost;
const double TAX = .07;
double tax_amount = book_cost * TAX;
double book_subtotal = book_cost + tax_amount;
total_book_cost += book_subtotal;
number_books++;
cout<<"\tStudent Textbook Purchases Report"<<endl;
cout<<"********************************************"<<endl;
cout<<"Student"<<"\tBook"<<"\tBook"<<"\tTax"<<"\tBook"<<endl;
cout<<"Id"<<"\tCode"<<"\tCost"<<"\tAmount"<<"\tSubtotal"<<endl;
cout<<"--------------------------------------------"<<endl;
cout<<student_id<<setw(5)<<book_code<<setw(8)<<"$"<<book_cost<<
setw(3)<<"$"<<tax_amount<<setw(4)<<"$"<<book_subtotal<<endl;
cout<<endl;
};
grand_total += total_book_cost;
total_books_sold += number_books;
cout<<"Total number of books purchased:"<<setw(8)<<number_books<<endl;
cout<<"Total books cost including tax:"<<setw(9)<<"$"<<total_book_cost<<endl;
cout<<"Please enter your Student ID, then press enter."<<endl;
cin>>student_id;
}
cout<<"**************************************************"<<endl;
cout<<"Grand Totals:"<<endl;
cout<<"Total number of students who purchased books:"<<endl;
cout<<"Total number of books sold:"<<endl;
cout<<"Total cost of all books and taxes:"<<setw(9)<<"$"<<grand_total<<endl;
//Can put grand totals here
system("Pause");
return 0;
}
I have wrote some basic code for a project. I am at the point I am trying to take an input from a RFID reader using a keyboard emulator. The follwing is my code to this point:
#include <iostream>
#include <ios>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
char product; //declaring the variable for the switch/case
int Pay = 0; //Declaring the variable Pay
int Payment = 0;
double Total = 0; // Declaring the Final Total variable
double Subtotal = 0; // Declaring the variable Subtotal
double Tax = 0; // Declaring the variable Tax
int m = 0; //counts the amount of times milk is scanned
int b = 0; //counts the amount of times beer is scanned
int c = 0; //counts the amount of times candy bar is scanned
int r = 0; //counts the amount of times rice is scanned
cout << "Scan the product you desire to purchase: \n";//Asking user to input product purchasing
cout << "When ready to checkout press the z button.\n\n\n"; //Telling user to press button z to pay
while(Pay < 1) //Keeps in the loop until pay is increased to 1
{
getline(cin, product); //Taking input and assining to the variable product
if(product == E007C02A55EF918D)
{
cout << "6 pack of Budlight...........$6.49\n"; // If the button b is pushed displays
Subtotal = Subtotal + Beer; // Calculates the Subtotal and stores it
Tax = Beer * Taxrate + Tax; // Claculates the total Tax and stores it
b++;
}
else if(product == E007C02A55EF937C)
{
cout << "Snickers Bar.................$0.99\n";// If the button c is pusehd displays
Subtotal = Subtotal + Candy_Bar;
Tax = Candy_Bar * Taxrate + Tax;
c++;
}
else if(product == E007C02A554A7A8B)
{
cout << "1 Gallon of 2% Milk..........$3.99\n";//If the button m is pushed displays
Subtotal = Subtotal + Milk;
m++;
}
else if(product == E007C02A55CE0766)
{
cout << "Box of Brown Rice............$2.79\n";//If the button r is pushed displays
Subtotal = Subtotal + Rice;
r++;
}
else
cout << "Invaild product. Please scan a different product.\n";
if (product == 'z')
Pay++; //When finished it increases pay to 1 to break the while loop
Total = Subtotal + Tax; // Claculates the Total
}
I am using MSVS 2010 to compile this code. With this code I can not compile because it says E007C02A55EF918D is undefined. E007C02A55EF918D is the serial number from one of the RFID tags and is what I am trying to input. I know I am having problems with the getline function also, but I am more worried about getting the serial number as an input.
char is big enough for a single character (it is usually an 8bit quantity, but don't rely on that).
So your product variable can only hold one char.
E007C02A55EF918D is an identifier (because it begins with a letter, it is not considered as a number, and because it is not quoted, it is not interpreted as a string).
If you intended product and those serial numbers to be 64bit numbers, you'll need to change product to be large enough to store them (uint64_t for instance), and change the serial numbers in your code to be numbers by prefixing with 0x. You'll also have to change your input method (getline takes strings, so you will need to convert that string to a number - see How to convert a number to string and vice versa in C++ for instance).
if (product == 0xABCD1234)
If you indented both to be strings, then declare product with:
std::string product;
and quote ("") the serial numbers. You'll also need to change the last test to:
if (product == "z")
^ ^
You can't compare an std::string with a single char ('z' is a char, "z" is a C-style 0-terminated string).
Try having it in "" and use strcmp() instead of ==, like
if (!strcmp("E007C02A55EF937C",product))
or
if (strcmp("E007C02A55EF937C",product)==0)
Hope it helped you.