I just started programming and want to make the game cows and bulls. The problem is that after the loop has ended and both vectors are not the same I want the user to 're-input' the starting variables a,b,c&d but I don't know how to.
Code:
#include "std_lib_facilities.h"
int comparison(int a, int b, int c, int d)
{
vector<int>bc={ 1, 2, 4, 9 };
[Code].....
I'm trying to create a program that will take input from a user and calculate it in a do-while loop. The program does the calculation but the answer is wrong. The loop also doesn't work. The purpose of the program is to see how much an item will cost after a discount is taken off and tax is added.
#include <iostream>
#include <cmath>
using namespace std;
double original_cost;
double discount;
double tax;
double total;
char answer;
[Code]...
I am stuck on an exercise where i am supposed to use a loop to take user input and keep a running sum until the user enters a 0. the code i have so far is:
#include <iostream>
int main() {
using namespace std;
int num;
int total = 0;
int x;
[Code] ....
The full text of the error message is: error c2678:binary'>>':no operator found which takes a left-hand operand of type 'std::istream' . and one more thing i was wondering, is there a difference between c++ and visual c++?
I am trying to create a simple interface on console to allow to input some values to some variables. For ex:
int main() {
double a = 1.5;
double b = 2.5;
double c = 3.5;
string x;
[Code] ....
However, I want these three to display at the same time (now they display one by one), and in the console window I can move the cursor between input place of a, b and c with "arrow key" of keyboard.
how double ended priority queue be used to implement external quick sort?
View 8 Replies View RelatedA while ago i was asked to write a program for a class that used a "Double ended queue with a current-position marker."
An example of some of the functions that i created are:
boolean atFirst() // Returns true if first element is current. Pre: !isEmpty().
boolean atLast() // Returns true if last element is current. Pre: !isEmpty().
void makeEmpty() // Sets this List to the empty state. Post: isEmpty().
void moveFirst() // Sets current marker to first element.
void movePrev() // Moves current marker one step toward first element.
void moveNext() // Moves current marker one step toward last element.
void insertBeforeFirst(int data) // Inserts new element before first element.
My question is whether a double ended queue with pointer is the same thing as a "doubly linked list" in this case. The terminology is throwing me of a little. If the two concepts are different, how is a doubly linked list different?
I have two variables t and x in an array that alternate. I want to add two t's and find the average and then do the same for the x's. After that, I want to find the slope of x -> t. My problem is that I specify the n for t, but since it's local I can;t use it for the slope. Here's my code so far:
#include <iostream>
using namespace std;
int main() {
double PA [8] = {0.0001234, 1.0005434, 0.0005678, 1.0023423, 0.00063452, 1.0001546, 0.00074321, 1.00017654};
[Code] ....
And, can I actually use the n2 as an index, or will the processor not understand that?
Code:
#include<stdlib.h>#include<stdio.h>
#include<unistd.h>
#include<math.h>
int main(void)
{
double N, NG, LG, epsilon, root; // setting all variables to type double
[Code] .....
The goal is to create a program to calculate the square root of a number provided by the user to an error tolerance 0.005
Looking around i fond the Code: fabs(NG - LG) < epsilon); section that was very similar to what i was using, but if this is better im down for that.
My issue, from what i can see, is the updating of the values of LG. if the test for error tolerance fails then LG needs to take on the value of the results of NG.
Now I am not 100% that is the point of failure due to the fact the script does calculate the root properly, but it never exits the program once it reaches the tolerance level.
Code: imac:ENG-3211 user$ ./hw_4_1
Please enter the number you wish to find the square root: 4
4.00 2.500
4.00 2.050
4.00 2.001
4.00 2.000
4.00 2.000
4.00 2.000
4.00 2.000
4.00 2.000
4.00 2.000
And it continues forever until i manually break the program even though the answer was found, in this example, on the 4th loop.
Assume all variable are declared correctly, the following for loop executes how many times?
for (i = 0; i <= 20; i++)
cout << I;
I think 20 but am not sure.
I want to create a vertical histogram in my code. I already made it go vertical but not the way I want it.
Example:
I want it like this:
Range1 Range2 Range3 Range4
And asterisks under each one, depending on the user input. (My code is below and doing it on here doesn't make it come out correctly)
But what I've managed to do is this:
Range1
*
*
*
Range2
*
*
Range3
*
*
*
*
Range4
*
*
Which I don't want. I want everything else to stay pretty much the same since I can only use some features such as Arrays and really basic functions.
Here is my code: (Worked fine last time I used it and I am doing it on Visual Studio 2010 (at uni) and 2013 (on my laptop)).
#include <iostream> //Start of code
using namespace std;
int MarkValueInput; //Mark entered by user
//Counter variables for ranges in While Loop
int counterlow; //Counter for low range
int countermidlow; //Counter for mid-low range
int countermidhigh; //Counter for mid-high range
int counterhigh; //Counter for high range
[Code] .....
I know that returning to main() is not a good idea but how will I loop the program to go back to the position selection when the voter is done voting for the last position.
when I run the program it seems fine. getting the votes from President to PRO Position is fine. The problem is how will the next voter vote without losing the vote (tally) of the previous voter?
FLOW:
SELECT POSITION (a-e) ---> SELECT A CANDIDATE (a-c) ---> (this goes on until the position of PRO) ---> ( then go back to the POSITION SELECTION)
After every vote there is a case statement for which I can choose to vote for the next position, quit, or show results (and after showing the results it will go to the next position to vote)....
#include<iostream>
#include<string>
#include <conio.h>
using namespace std;
int pca=0,pcb=0,pcc=0,ptv=0;
[Code] .....
How to input two variables in the same line? Like when i type 12 and press enter, 1 must be assigned to a, and 2 must be assigned to b. I want it to be entered on the same line, and press enter only once. How do i do that?
View 5 Replies View RelatedMaking a game of checkers on C++ win32, visual studio
when i want a piece to move, i type:
cout << "What piece do you want to move? (C4)" << endl;
i type in 'cin' after to get the players input, but how do i get it to store the players input in a certain variable? im going to have a list of variables:
string a1
string a2
string a3
etc
so if the user types in a2, it automatically goes to that variable and then asks the user "where do you want the piece to be moved to?".
I am using Visual C++ to write an app. One problem is that the application will allocate a lot of object instances of a specific class CMyObject, maybe 400, 000. This will cause "Out of memory" error when total allocated CMyObject reaches 400,000.
To solve this problem, I just wonder when a new CMyObject instance is created, is it possible to specify so that the instance will allocate on a disk cache, or file mapping instead of the memory space?
I'm trying to create an executable with C or C++ that send a command with the function system, but it waits for a command or key.
Example :
I send this:
C:
unas /noprofile user:administrator notepad.exe
But it waits for password.
Please type the password :
So my question is how can I make to send the password or that my program detect that prompt.
In the following code I want to iterate through "Win32_OperatingSystem" to find all variables and their values. Using GetNames() I can get the names of all the variables but the subsequent Get() call fails to return a value.
Code:
//connect to WMI
std::wstring wmiClass = L"Win32_OperatingSystem";
CComPtr< IWbemLocator > pLocator;
HRESULT hResult = pLocator.CoCreateInstance( CLSID_WbemAdministrativeLocator, nullptr, CLSCTX_INPROC_SERVER );
if ( SUCCEEDED( hResult ) )
[Code] ....
This is an example from C++ Primer on while loops shortened for simplicity:
int main() {
int value = 0;
while(cin >> value) cout << value;
return 0;
}
When I compile and run the above code the program keeps asking for input after I input nothing but pressing ENTER no matter how many times. The only way I can get it to stop asking for input is to input something other than an int such as a char or string. Program executes as intended after that. I have googled this issue and read all seemingly relevant results and nothing seems to pertain to my exact problem. I think it may have something to do with my computer's own settings or something and am baffled as to what it may be.
C++
Create a Triangle class that has the following member variables:
side1 - a double
side2 - a double
side 3 - a double perimeter area
The class should have the following member functions:
- default constructor that sets the value of all 3 sides of a triangle to 0.0
- a constructor with arguments that accepts values for the three sides of a triangle (member variables) as arguments
- setDimensions - a function that allows the value of the three sides to be entered by the user through the keyboard
- testSides - a function that determines if the 3 values entered can actually be the sides of a triangle. If they do not create a triangle, print the values entered and an appropriate message
--The sum of any two side lengths of a triangle must always be greater than the length of the third side: so side 1 + side 2 > side 3 and side 1 + side 3 > side 2 and side 2 + side 3 > side 1 ( all three must be true for the 3 values to make a triangle)
- getSide1 - a function that returns the value of side 1, getSide2 - a function that returns the value of side 2, getSide3 - a function that returns the value of side 3
- getArea - a function that returns the area of a triangle: The formula for the area of a triangle (when the height is not known) is: A = sqrt (p(p-side1)(p-side2)(p-side3)) where p = (side1+side2+side3)/2
- getPerimeter - a function that returns the perimeter of a triangle: Perimeter = side1 + side2+ Side 3
- A displayTriangleInfo function that displays side1, side2, side3, area, and perimeter for a triangle object.
After testing your code for a single object, create an array of 5 triangles. Use a for loop and the setDimensions function to allow the user to set the values for the 3 sides of a triangle, test the vales entered to determine if the 3 create a triangle. If they do create a triangle than use the getArea and getPerimeter functions to calculate the Area and Perimeter for the triangle and use the displayTriangleInfo function to display all of the data for that triangle. If the three values do not create a triangle then print the 3 numbers entered and an appropriate message. In either case the loop should then move on and get the data for the next triangle from the user.
I came across the following code today and I was a bit surprised that it worked:-
Code:
std::string func_A () {
static std::string x;
if (!x.empty())
return x;
[Code] ....
I've simplified things slightly - but the basic point is that both functions are in the same source file and they both have a static std::string called 'x'. Being static, I guess they aren't (strictly) local variables. So how does the compiler know that they're different entities? Does it encode their signatures using the function name or something like that? If I call each function separately I do seem to get the correct string...
// PROBLEM - Use INPUT VALIDATION so number entered is positive. I can't get it to work
#include <iostream>
#include <iomanip>
using namespace std;
int main(int argc, const char * argv[]) {
// SUM OF NUMBERS
// Enter a positive integer
[Code] ....
I have created a windows form project in visual studio so that I can use a windows form to interact with the game class that I'm creating, but I'm running into some problems.
For one thing, I would like to be able to call Image::FromFile() one time only during initialization, and store the result in a member variable (called mBGImage). From what I can tell, the variable needs to be of type String^ (this caret symbol is new to me, but I understand it is the "managed code" version of the standard pointer, which would look like String*).
When I try to compile the following code (located in my header file) I get the error :
"error C3265: cannot declare a managed 'mBGImage' in an unmanaged 'BSG::BSGame'".
How can I store the result of Image::FromFile() permanently in my class?
When I try to declare a global variable of type "Image^", I get "error C3145: global or static variable may not have managed type System:rawing::Image ^"
#include "stdafx.h"
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
[Code] ......
I am new to VC++ 2012. I have this code snippet.
Code:
auto it = query_map.find(U("callback"));
The problem is right under the dot there is a red line the error is
Error1error C2664: 'std::_Tree_iterator<_Mytree> std::_Tree<_Traits>::find(const http::uri::encoded_string &)' : cannot convert parameter 1 from 'const wchar_t [9]' to 'const http::uri::encoded_string &'d:maverickprojectsstrikeforcesrcserverserverserver.cpp26
What is the solution to this error?
I have written a class "FileSet " in program's Document class.
This class contains other Four classes as
"Machine1" , "Machine2", "Machine 3" and "Machine 4".
Now my problem is Machine 1 can not access variables from Document class or other variables from FileSet.
How to access them ?
I have a small loop that gets the user input, as well as acts as input validation to make sure he or she doesn't enter a value that is not within the specified range.
The user is supposed to enter a month number. E.g. if he or she chooses February, then enter 2, or December, 12.
It works correctly if they type a number that is not in the range, but goes into an infinite loop if, say, they type a string such as "month".
Code:
int main() {
// Variable Declaration(s)/Initialization(s)
int month=0;
// Get input
cout<<"Enter a month";
cin>>month;
[Code] ....
How could I go about revising this?
I'm not finished with this code, but I am stuck on this one glitch. This is what I have so far, and it's not working.
Code:
int main() {
/*Please input an n value greater than zero. Otherwise, exit the program by entering a carriage return*/
printf("Please input an n value greater than zero. Otherwise, exit the program by entering a carriage return
");
int summation = 0, x, y;
scanf("%d", y);
for (y == x; summation <= M_E && x <= 34; x++)
[Code] ....
Some of my loop is not working. How messed up is this code.. Commented non working code
// ADIT.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include "windows.h"
[Code]....