C++ :: Acyclic Visitor Pattern - Count Number Of Elements Of Certain Type In Container
Jun 29, 2014
Acyclic visitor pattern used here to count the number of elements of a certain type in a container.
struct A {
struct Visitor {
virtual ~Visitor() = default;
};
virtual void accept (A::Visitor&) = 0;
[Code] ....
Give the correct:
count = 3
But it is scrappy. The visitor classes had to be placed outside the classes they belonged to, and CountB lost its template because of that. Also, it is very awkward that I have to construct a "reverse hierarchy" for the Visitor classes (which means that this has to bechanged if I ever change the hierarchy for A, B, C, ...). How to improve my solution (using acyclic visitor pattern)? Forward declaring nested classes is not possible in c++.
View 1 Replies
ADVERTISEMENT
Nov 20, 2012
#include <iostream>
using namespace std;
int main() {
int h;
double A[10][10];
[Code] .....
View 4 Replies
View Related
Mar 19, 2013
How can i count the total no of unique elements in an array? Like I have an array.
Code:
int array[]= { 2,1,4,0,3,3,0,0,1,2,1,1}
// As it has 0,1,2,3,4 as unique values so total no of unique values are=5
int unique =5;
View 4 Replies
View Related
Feb 17, 2012
Is there an algorithm in the STL to move elements similar to how std::copy works? I have read various places that the new C++ standard has a move algorithm. Unfortunately the compiler I use (g++ (GCC) 4.2.0) does not support any C++0x updates.
I have a std::deque that I want to move a range from into an array. I am currently using something like this where
data_array is an unsigned char pointer to a buffer being passed in by the caller
dataQ is a std::deque<unsigned char> that is a member variable maintained within the class
Code:
for (int i = 0; i < numberBytesRequested; ++i) {
data_array[i] = dataQ.front();
dataQ.pop_front();
}
I'm concerned that executing this loop over and over again is going to be very inefficient.
View 8 Replies
View Related
Sep 13, 2014
I need to make singly and doubly linked list classes that can insert elements. Once the lists are created, I need to order the linked list elements according to a certain pattern.
order2 pattern:
input: 0 1 2 3 4 5 6 7
output: 1 0 3 2 5 4 7 6
order3 pattern:
input: 0 1 2 3 4 5 6 7 8 9 10 11
output: 2 1 0 5 4 3 8 7 6 11 10 9
sequence order pattern:
input: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
output: 1 0 4 3 2 8 7 6 5 13 12 11 10 9
reverse pattern:
input: 0 1 2 3 4 5 6 7 8 9
output: 9 8 7 6 5 4 3 2 1 0
My instructor has given the description of the required classes in a file interfaces01.h as:
#pragma once
#include <cstdlib>
struct ISingleNode {
ISingleNode() {}
virtual ~ISingleNode() {}
virtual void setValue(int value) = 0;
virtual int getValue() = 0;
[Code] ....
However when I am compiling these files in vs 2013 I am getting the error: cannot open include file Singlenode.h,Singlelist.h.
Also I am not too sure about the sorting and reverse logic. How can I implement these logics.
View 1 Replies
View Related
Jan 19, 2014
How to write a program without using any type of container .
View 4 Replies
View Related
Feb 6, 2014
In this program what i'm doing is to search for a number when the vector is in order, and count how many times that number appears, the problem is that count how many times the number does not appear, but when its appear the program stays in an "standby mode" and the cursor does not move.
int buscarNumOrdenado (int x [MAX]) //MAX is the define {
int num,d, LimiteInferior, LimiteSuperior,mitad;
d=0;
LimiteInferior = 0;
LimiteSuperior = MAX-1;
[Code] ....
View 2 Replies
View Related
Sep 26, 2012
I'm running a game online and designing a program to generate Enemy Stats. Basically, it's supposed to generate 25 numbers between 0 and 7(to represent 8 Attributes on a 25 Point Buy system) and count how many times each number shows up.
Here's what the code looks like:
Code:
#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;
int Generate() {
int r= rand();
int s= r%7;
[Code] ....
And here's two outputs.
1: Code:
12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 12133089220 Stats[0]= 25 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 0 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall
2: Code:
14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 14787708434 Stats[0]= 0 Stats[1]= 0 Stats[2]= 0 Stats[3]= 0 Stats[4]= 25 Stats[5]= 0 Stats[6]= 0 Stats[7]= 0 Stats[8]= 0 Disallowed system call: SYS_socketcall
Note that the number does change, but only between runs.
View 3 Replies
View Related
Apr 14, 2013
This is a code I've written for Random Directed Acyclic Graph Generation:
Code:
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <time.h>
using namespace std;
[Code] .....
However this gives two LNK2019 error codes. I'm new to coding... I'd like to learn what I'm doing wrong.
View 9 Replies
View Related
Mar 9, 2013
The following fuction from a class is supposed to count the number less then the average of all number combined. but it does not do that, now the fun part if you change it to count the number greater then the average it works great.
void IntegerArray::countBelowAverage() {
avrg=calcAverage(avg);
int count=0;
for(int x=0; x<100; x++) {
if (list[x]<avrg)
[Code]...
How do i get this to post in the proper format?
View 1 Replies
View Related
Jan 18, 2015
How can I define type MARKS which will be able to hold 4 elements just like array? I want to access it just like normal array elements using brackets []. In the following struct I want to use such type.
Code:
typedef struct {
MARKS ** pointers;
} ARGUMENTS
void main(){
ARGUMENTS arguments;
[Code] ......
Purpose of the struct ARGUMENTS is to hold 4 pointers to string. I want to mark few positions in string so I can simple access them. E.g. name=John
Code:
arguments[0][0]=0; // begin of the param name
arguments[0][1]=3; // end of the param name
arguments[0][2]=5; // begin of the value
arguments[0][3]=8; // end of the value I mean not to save int but the pointer to the corresponding position.
View 8 Replies
View Related
Jan 8, 2013
I want to use a dataset of type set which will have the type pair<char,string> or pair<string,string>. How can i insert values into the set, because i have to initialize the set and will not change the set during the program.
View 3 Replies
View Related
Oct 7, 2014
here is a piece of my code:
while(T--)
{
std::vector<std::pair<int, int> > *dragon;
std::vector<std::pair<int, int> > *villager;
[Code]....
I now wish to print the elements of the vector. How do I do it?
View 2 Replies
View Related
Mar 30, 2013
"Write a declaration for a function that takes two int parameters and returns an int, and declare a vector whose elements have this function pointer type."
View 9 Replies
View Related
Dec 16, 2014
4.1 Write a program that will count from 1 to 12 and print the count, and its square, for each count.
4.2 Write a program that counts from 1 to 12 and prints the count and its inversion to 5 decimal places for each count. This will require a floating point number.
4.3 Write a program that will count from 1 to 100 and print only those values between 32 and 39, one to a line. Use the incrementing operator for this program.
View 2 Replies
View Related
Apr 11, 2013
i am writing a program that accepts a decimal number from the user and convert it to binary numbers. After the conversion, i should count the number of 1's and 0's in the said binary number. I got upto converting and counting 1's using Brian Kernighan’s Algorithm. But, i can't seem to get it to count the number of 0's.
#include <iostream>
#include<bitset>
using namespace std;
int main() {
int num,count=0,Zero,count1 =0;
cout<<"Enter the number:";
cin>>num;
string binary;
[code].....
View 7 Replies
View Related
Sep 5, 2014
I am writing a program that counts the number of sentences in a string. I count the number of '.' '?' '!'. However, there are Mr. Mrs. PhD. Dr. .
int number_of_sentences = 0;
for(unsigned int i=0; i <= text.length()-1; i++){
if(text[i] == '.' || text[i] == '?' ||text[i] == '!'){
++number_of_sentences;
}
}
return number_of_sentences;
View 3 Replies
View Related
Jul 7, 2014
I was wondering how to limit error message to one only.
For example
cin.getline(stringname,7);
for(int i=0;i<size;i++){
if(strcmp(stringname, "hello")=0)
cout<<"Found!"<<endl;
else
cout<<"not found"<<endl;
}
not found
not found
.......
I want to get only once not found
View 2 Replies
View Related
Apr 28, 2015
#include <fstream>
#include <iostream>
#include <string>
[Code].....
When I try to run my program I get:
1>LINK : error LNK2001: unresolved external symbol _mainCRTStartup
1>C:UsersDocumentsVisual Studio 2010ProjectsCS 111Lab10Lab10DebugLab10.exe : fatal error LNK1120: 1 unresolved externals
What I'm trying to do is get my program to count the number of words in an inputted data file. I've attached the assignment directions
Attached File(s) : lab10_data_.zip (9.27K)
View 4 Replies
View Related
Dec 24, 2014
This shows any prime number between a and b and also counts them*/
#include <iostream>
using namespace std;
int main(){
int a;
int b;
[Code] .....
View 1 Replies
View Related
Jan 31, 2014
I want to count number of words from my textfile and then make the first word ToUpper and second word ToLower and do that for the rest of the textfile.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace ConsoleApplication3 {
internal class Program {
private static void Main(string[] args) {
[Code] ....
View 14 Replies
View Related
Jan 29, 2014
I want know if the query returned zero rows or not.
Don't want to use count(*)
sql = "select * from TABLE where employeefirstname = @First order by EmploymentStatusDescription";
using (SqlCommand cmd = new SqlCommand(sql, conn)) {
cmd.Parameters.AddWithValue("@First", First);
reader = cmd.ExecuteReader();
} while (reader.Read())
View 7 Replies
View Related
Dec 20, 2014
Write a c++ program to count no of letters in a given line
Write a c++ program to calculate employee salary
validation : for the salary less than 5000
a. HRA IS 15% OF BASIC salary
b. DA is 35% of basic salary
for salary above 5000
a. HRA is 5% of basic salary
b. DA is 25% of basic salary
View 7 Replies
View Related
Feb 4, 2013
Below is the response XML my programmer is getting from business service -
<Data>
<Maintain>
<AssetList>
<AssetDetails>
<AssetDescriptor>
<ns1:ParentProductCat category="ABC">ABC</ns1:ParentProductCat
[code].....
In above XMl if you check the ParentProductCat is prefixed with ns1:,ns2:,ns3:....
My XSLT code only checkes for the ParentProductCat but since it is prefixed with "ns*:" (* is integer) it fails to find it. So that in C# code replace function is used to replace ns*: a for loop is used for this and it goes until 1000
But now my response crossed the 1000 mark and this time the XML contains total 14500 lines.So I want to replace all ns:*
For this I want to count the number of lines present in the XML so that the for loop will run until that line number. how to do that?
View 2 Replies
View Related
Jan 15, 2014
write a program that counts the number of digits in a file?
For example the file contains:
5 6 7 -8 9obvsefs
6 7 8i uhbnm
8 8
And the program returns: "The number of all digits is 10"
View 3 Replies
View Related
Jan 14, 2014
the text file looks like: one hello hi twenty-five billion fifty maths three thousand and two
output: count the number of text numbers: 4
View 1 Replies
View Related
