Possibly Step Backward is no longer a feature in VS 2019. I'm running VS 2017, and it is there, but only if the debugger is running.yungman said:
ThanksMark44 said:
InventoryItem.h (Version 3) on page 759. The "third constructor" is labeled "Constructor #3". It receives three arguments.inventory, supplying three arguments each time.inventory[0] and inventory[2] are each constructed with one argument: a C-string. Therefore "Constructor #2" is used (because it receives one argument, a C-string). inventory[1] is constructed with three arguments: a C-string, a double and an int. Therefore "Constructor #3" is used.Besides the different versions (2015, 2017, 2019, and earlier), there are different editions, such as Community Edition, Enterprise Edition, and one or two more that I don't remember. If you have the (free) Community Edition, maybe its features are limited. I have version 2017, but it's the Enterprise Edition.yungman said:
@jtbell explained this pretty well, but just in case, the constructors are numbered in the code you showed.yungman said:
No, this isn't reasonable. The topics in this book and most other programming books build on each other, and aren't standalone. What you're asking for is like saying that every use of int should refer back to where this keyword was defined. Eventually the chapters would be mostly references back to previous material, with very few parts devoted to new topics.yungman said:
#ifndef invItem_H
#define invItem_H
#include <cstring> // Needed for strlen and strcpy
#include <iostream>
class invItem
{
private:
char* description; const int L = 21; double cost; int units;
public:
//This part of the code will give error
invItem item1()
{ char cA1[] = "Alan";
description = new char[L];//0
strncpy_s(description, L, cA1, L);
cost = 0.0; units = 0;}//2
invItem item2(char *desc)//12
{ description = new char[strlen(desc)+1];//13
strncpy_s(description, strlen(desc)+1, desc, strlen(desc)+1);//14
cost = 0.0; units = 0; }//15
invItem item3(char* desc, double c, int u)//18
{ description = new char[strlen(desc) + 1];//19
strncpy_s(description, strlen(desc)+1, desc, strlen(desc)+1);//20
cost = c; units = u;}//21/*This is the exact code as above. If you use this part, it will work.
invItem() // Constructor #1
{ char cA1[] = "Alan";
description = new char[L];
strncpy_s(description, L, cA1, L);
cost = 0.0; units = 0;}// 2--Default values
invItem(char* desc) //12 Constructor#2
{ description = new char[strlen(desc)+1];
strncpy_s(description, strlen(desc)+1, desc, strlen(desc)+1);
cost = 0.0; units = 0; }//15---Default value
invItem(char* desc, double c, int u)//18-Constructor#3,No default value
{ description = new char[strlen(desc) + 1];
strncpy_s(description, strlen(desc) + 1, desc, strlen(desc) + 1);
cost = c; units = u;}//21 --From main()
This is the end of the working code*/
~invItem() { delete [] description; }//42, 43, 44
//Mutator function only for Constructor#1
void setDesc(char *d) {strncpy_s(description, L, d, L);};//5--d=cAr1
void setCost(double c) { cost = c; }//7
void setUnits(int u) { units = u; }//9
// Accessor functions
const char *getDesc() const { return description; } //25, 31, 37
double getCost() const { return cost; }//27, 33, 39
int getUnits() const { return units; }//29, 35, 41
};
#endif#include <iostream>
#include <iomanip>
#include <cstring>
#include "invItem.h"
using namespace std;
int main()
{//Create invItem object item1, to Constructor#1, set default values
invItem item1;
char cAr1[] = "Hammer";//3
item1.setDesc(cAr1);//4--to mutator
item1.setCost(6.95);//6--to mutator
item1.setUnits(12);//8---to mutator
//Create invItem object item2 with one parameter
char cAr2[] = "Pliers";//10--input parameter to item2
invItem item2(cAr2);//11--cost and units by default
//Create invItem object item3 with 3 parameters
char cAr3[] = "Wrench";//16
invItem item3(cAr3, 8.75, 20);//17 parameters for item3
cout << "The following items are in inventory:\n";//22
cout << setw(20) << setprecision(2) << fixed << showpoint;//23
//Display item1 use item1. to access member functions
cout << "Description: " << item1.getDesc() << endl;//24
cout << "Cost: $" << item1.getCost() << endl;//26
cout << "Units on Hand: " << item1.getUnits() << "\n\n";//28
//Display item2
cout << "Description: " << item2.getDesc() << endl;//30
cout << "Cost: $" << item2.getCost() << endl;//32
cout << "Units on Hand: " << item2.getUnits() << "\n\n";//34
//Display item3
cout << "Description: " << item3.getDesc() << endl;//36
cout << "Cost: $" << item3.getCost() << endl;//38
cout << "Units on Hand: " << item3.getUnits() << "\n\n";//40
return 0;
}yungman said: