What is the answer and reason for the value of a and b
#include<iostream.h>
#include<conio.h>
void main()
{int a=3;
int b = ++a + a++ + a-- + --a;
cout<<"
enter a:"<<a;
cout<<"
enter b:"<<b;
getch();
}
Parts of this program are missing. The last few lines are confusing, since the variable 'a' gets incremented then decremented. But there are no loops. I understand that the value of 'a' is passed to 'c' before 'a' is changed in both cases.
But where, and when, do the changes take place? Is the decrement ever processed? Is there a better way to write these lines?
Code:
main(){ int a = 21;int b = 10;int c ;
c = a++;
cout << "Line 6 - Value of c is :" << c << endl ;
c = a--;
cout << "Line 7 - Value of c is :" << c << endl ;
return 0;}
Is it possible to increment and decrement in the same loop? I can do it with 2 loops but id like to do it with just one loop.
Code:
for(i=1;i<=5;i++)
for(j=5;j>=1;i--)
Is there a way to do both operations with one loop?
I am trying to call Display menu. If up key is pressed Displayed has to be incremented and stay in particular window if Decremented, go to previous Display function and show previous Display function. LCD & Keypad Shield Quickstart Guide | Freetronics
Code:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
static int button_counter=0;
[Code].....
I have two files NumDays.h and ClientProgram.cpp
clientprogram.cpp basically has the main module below
int main(){
// Initialized UDT object Declarations
NumDays hoursWorked_John; // Instantiate with Default Constructor
NumDays hoursWorked_Sue(36.9); // Instantiate with Initializing Constructor
NumDays hoursUsed_Sue(4.5); // Instantiate with Initializing Constructor
[Code] .....
I can't figure out anything to put in for NumDays.cpp so it's not there.
In the following program.
void main() {
int a=1;
cout<<a++<<" "<<++a<<" "<<a++<<endl;
}
If I execute the above program i should get 1 3 3. But I'm getting different values when I executed this program. The values that I get after execution are 3 3 1.
I created a table called registration and I have set an auto increment ID for each record. The problem is when I delete a certain record the ID didn't remove or deleted, for example if I entered these records: -
1,Bob,Bob123,Bob_2@hotmail.com then if I deleted it the next id record will be 2 which is supposed to be 1.
here is the SQL Command:-
CREATE TABLE Registration (
Reg_Id INT PRIMARY KEY IDENTITY,
Name varchar (255),
UserName varchar(255) NOT NULL,
Reg_Password varchar(255),
Email varchar(255),
Reg_Rank varchar(255)
);
Im using a recursive function to sort array. The decrement operator is used to eventually get to base condition in function. Used debugger the size-- expression is not decrementing. I figured out how to fix it but dont quite understand it.
[coed]
#include "stdafx.h"
#include <iostream>
void selectionsort(int [], int);
int main()
{
using namespace std;
const int arrysize = 10;
[Code]...
how the output for the program below comes to 45 and 46 respectively.
Code:
#include<stdio.h>
#include<conio.h>
void main()
{
int x=10,y=10;
clrscr();
//printf("%d
[Code] ....
The output obtained for the above program is 45 and 46.
Here is the code:
// Creating and joining string objects
#include <iostream>
#include <string>
using std::cin;
using std::cout;
using std::endl;
using std::string;
using std::getline;
// List names and ages
void listnames(string names[], string ages[], size_t count) {
[Code] ....
I may be wrong, but the problem seems to be in the function "listnames". Specifically, the output statement inside the while loop. I don't understand , how the ++ operator is behaving in this statement. The output produced does not match what's printed in the book. I usually just type all the examples, but with this one I also downloaded the source code from the book's website to make sure the error wasn't due to mistyping.
Code:
#include <cstdlib>
#include <iostream>
#include <string>
#include <stdio.h>
#include <windows.h>
#include <conio.h>
#include <exception>
#include <process.h>
using namespace std;
int main(int argc, char *argv[])
[code]....
I'm doing a refresher for C++ and have gotten to operator overloading. I'm trying to perform an operator overload with the insertion (<<) operator, but I have encountered a problem.
Here's my class [In a header file "Shinigami.h"]
#include<string>
namespace K{
class Quincy;
class Shinigami{
friend std::ostream& operator<<(std::ostream&, const Shinigami&);
[Code] .....
If the operator function is a friend of the 'Shinigami' class, why doesn't it recognize any of it's private members? I need it to be in this file because I'm doing a bit of association with the 'Quincy' class.
I thought it was the namespace, but I included that.
Code:
int i=5,j;
j=++i + ++i + ++i;
printf("%d",j); //22
i=5;
j=i++ + i++ + i++;
printf("%d",j); //19 Shall not it give 21 and 18 respectively?????
I have created this code; it is a taxi management system. I've made a class 'List' which handle a linked list structure of the waiting taxis and waiting passengers. The class has a public int variable: waiting, which keeps track of the number of waiting taxis/passengers.
#include<iostream>
using namespace std;
class Queue{ //Class for indivdual taxis and passengers, which will be members of linked list.
public:
string id;
Queue *next;
Queue (){
[Code] .....
But when I run the code and type in a new taxi number, the code does not increment the number of taxis by one the linked list by one. I can't seem to find the problem.
BTW, in the 'int main', I've added "<< taxi_list.waiting" at the end of the line after the user inputs the new taxi registration number, so that I can see how many taxis are now on the list. This is what is being shown as zero, no matter what.
I have a counter that onclick should increment 1 and it does that on click, but if I click the button again, it won't increment again. Instead it will be stuck at 1. How can I make it go up if the button is clicked more than once? Also this is a web application.
protected void submitAnswerButton_Click(object sender, EventArgs e) {
int counter = 0;
if (mathAnswerTextBox.Text == answer.ToString()) {
answerStatus.Text = "Correct!";
[Code] ....
This is my code as following
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
[Code]....
I have driver table this is my fields as following
DriverID INT
DriverName nvarchar50
Nationality nvarchar50
Address nvarchar50
I have form driver have 4 texbox
textbox1 DriverID
textbox2 DriverName
textbox3 Nationality
textbox4 address
this table have two records
when i press buton next (NextBtn_Click)to go third record it not accept I need next button increase by 1 if record not exist and update this in table How i do this example if i have two records
1 aln american newyork
2 adam british british
when i press next button it ok work in records exist but when i press next button to third record it not accept why what i need is when press next after 2 it come 3 in text box driver id and update this number in table
I got the core dump file so I know exactly which line it crashes. Below are some of the information:
OS: Red Hat Enterprise 5.8
Example snippets of when the crash happen:
Code:
typedef map<int, MyClassObj> MyMapT;
.
.
void someFunction( MyMapT& inMap )
{
for ( MyMapT::iterator iter=inMap.begin(); iter!=inMap.end(); ++iter )
{
.
.
}
}
Using GDB, I am able to find out that it crashes at the "++iter" as the .h file indicate it was a "++" operation for the iterator. Tracing up the stack frame it indicate it crash during the copy constructor of some "__rb_tree_node". I did some Googling and it seems that is some Red-Black tree implementation for the map. Honestly I do not quite understand the Red-Black tree and I believe STL map is a very very well tested container, so the problem must lie in my code so that I can look out for it.
I have a class I am building called date and I've built all my functions to run and done all the necessary error checking in each function. However, my last and final function I have to write is where the # of days passed in as a parameter and then I have to increment the days by that many. And if the user does not increment any days at all in the parameter and leaves it blank, then it automatically increments by one day. I am having trouble with this. So for example if the user was to do this:
Date d1(10, 31, 1998); // Oct 31, 1998
Date d2(6, 29, 1950);// June 29, 1950
d1.Increment(); // d1 is now Nov 1, 1998
d2.Increment(5);// d2 is now July 4, 1950
The function starts out looking like this
void Date::Increment(int numDays = 1) {
}
I know I have to use a for loop to accomplish this. I just don't know how to get it to where the days passed in will go to the next month and then days passed in would go to the next year.
I am a bit lost as I am new to C++ and programming in general.
#include <stdlib.h>
#include <stdio.h>
#include <fstream>
#include <iostream>
#include <windows.h>
using namespace std;
int main() {
ofstream myfile;
[Code] ....
msi
1247
1248
1249
1250
1251
285216ms delay
2853
2854
2855
2856
in the csv file, as above, after every 12 to 13 increment of i there is a skip of 15ms to 16ms. I do not understand why the ms is not a uniform increment. Is there another way I can get a uniform increment of ms?
I have a text box invoice no on windows form and i need to retrieve data from database and everytime user click on the add button the invoice no should increment by 1...
View 7 Replies View RelatedI am to first increment data members of object that has not created dynamically (i have done with this part),now i have created object dynamically and how to increment its data which i have passed as argument as:
obj3 = new manage(35 , 36)
In this code:
// Ex10_15.cpp Using lambda expressions
#include <algorithm>
#include <iostream>
#include <iomanip>
[code].....
The lambda accepts no arguments, but it accesses increment by value and current by reference, the latter being used to store the next value to be set. This lambda has the side effect that current will be updated when generate is finished. The following lambda expression is similar, but without the side effect:
[=]()mutable->T{T result(current);
current += increment;
return result;}
"
I dont exactly understand what side affect it is talking about. Wouldn't you want generate to update current? I understand how the second code fixes it though, just takes everything in the enclosing scope by value.
I have a version.txt file and it looks like
Script=01
build date=yy.mm.dd
Mainversion=1.00.00.00:01
need a batch script or C# code increment the version if i trigger a build and expected output as
Script=02
build date=yy.mm.dd (Current date)
Mainversion=1.00.00.00:02
i know
Code: (condition) ? true-clause : false-clause
but how do you use an array as the condition, how will the code look?For example i want to write
Code:
string numbers[5] = {"one","two","three","four","five"};
numbers == "one" ? thumb : again; thumb and again will replace something else. Don't worry about them.
how do i say that if the numbers array is representing "one" then it replaces as "thumb", otherwise "again".
Is it usual to rely completly on the new operator in constructors/copy constructors. What if new trows an exception? The application ends and that's it? The new operator can be placed where it can't be catch like in constructor initialization list. What kind of practice I should adopt when using "new" in those cases?
The sample code below is taken from here... [URL] ....
class MemoryBlock {
public:
// Simple constructor that initializes the resource.
explicit MemoryBlock(size_t length)
: _length(length)
, _data(new int[length])
[Code] .....
In this below example:
class Point {
private:
double m_dX, m_dY, m_dZ;
[code].....
In that situation, << does not call the overloaded function, but rather calls the << method defined in the i/o library, which prints a message to the controlling terminal. So once it prints the message to the terminal, it then returns the out instance. Why return the out instance rather than a boolean like true? As you can see from the example, once the message is printed to terminal, out is not used anymore.