Exam (elaborations)
COS1512 EXAM PACK 2023
- Course
- Institution
COS1512 EXAM PACK 2023
[Show more]
Seller
Follow
Solutionist
Reviews received
Content preview
COS1512EXAM PACK
2023
,JUNE 2017 P2
1 C STRINGS
Error Correction
If(str!=”STOP” If(strcmp(str,”STOP”);
Str = “STOP” Strcpy(str,”STOP”);
2 RECURSION
Void CountDown(int num)
{
If (num = 0)
Cout << 0 << endl;
Else
{
Cout << num << endl;
CountDown(num-1);
}
}
3 POINTERS
3.1 The problem with this this code fragment is that the code deletes the pointer.
Thereafter, the programmer is assigning the value to a pointer that doesn’t point to
anything. The results are disastrous.
3.2 Correct the Code
3.2.1 5 : p1 = &x; 6 : p2 = &y;
3.2.2 7: cout << *p1 << “ “ << *p2;
3.2.3 9: 30
3.3 typedef int* myPtr;
myPtr = a;
int size’;
a = new int[size];
4 DEFINE PRODUCT CLASS
Product.h
#ifndef PRODUCT_H
#define PRODUCT_H
#include <iostream>
#include <cstdlib>
#include <string>
#include <fstream>
Page 1 of 6
,JUNE 2017 P2
using namespace std;
class Product
{
public:
Product();
~Product();
long getNumber();
void reset(long rID, double rPrice, long rNum);
void increaseRetailPrice(float incPercent);
friend bool operator ==(const Product &p1, const Product &p2);
friend Product operator -- (Product &P);
friend istream& operator >> (istream& ins, Product &P);
friend ostream& operator << (ostream& outs, const Product &P);
protected:
private:
long id;
double price;
long number;
};
#endif // PRODUCT_H
Product.CPP
#include "Product.h"
#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
Product::Product()
{
id = 0;
price = 0.0;
number = 0;
}
Product::~Product()
{
//dtor
}
long Product::getNumber()
Page 2 of 6
, JUNE 2017 P2
{
return number;
}
void Product::reset(long rID, double rPrice, long rNum)
{
id = rID;
price = rPrice;
number = rNum;
}
void Product::increaseRetailPrice(float incPercent)
{
price = price + (price * incPercent);
}
bool operator ==(const Product &p1, const Product &p2)
{
if ((p1.id == p2.id) && (p1.price == p2.price) && (p1.number == p2.number))
return true;
else
return false;
}
Product operator-- (Product &P)
{
--P.number;
return P;
}
istream& operator >> (istream& ins, Product &P)
{
ins >> P.id >> P.price >> P.number;
//ins >> P.price;
//ins >> P.number;
return ins;
}
ostream& operator << (ostream& outs, const Product &P)
{
outs << P.id << endl;
outs << P.price << endl;
outs << P.number << endl;
return outs;
Page 3 of 6
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Solutionist. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.50. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
85443 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now