C++ :: Difference Between Enumeration With And Without Name

Jun 14, 2014

Code: enun{go, stop, ready, halt}
vs
enum status{go, stop, ready, halt}; and where is enumeration with name is benefficial.

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C++ :: How To Restore Consecutive Enumeration

May 10, 2014

I have an array of groups of numbers (I call them classes), that might look like this:

Code: static const int arr[] = {1,1,3,3};
std::vector<int> classes( arr , arr + sizeof(arr) / sizeof( arr[ 0 ] ) );

or like this

Code: static const int arr[] = {1,3,3,3,5,5,6,8};
std::vector<int> classes( arr , arr + sizeof(arr) / sizeof( arr[ 0 ] ) );

The groups of numbers are in an increasing order, but not numbered consecutively. So, would I would like to have is this

1,1,2,2

and

1,2,2,2,3,3,4,5

A loop like this

Code: for ( int i = 1; i < classes.size(); i++ )
if ( classes.at( i ) > classes.at( i - 1 ) )
classes.at( i ) = classes.at( i - 1 ) + 1;

does not work, because it changes the preceding value in the group, thus destroying the group. How would you do it?

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C++ :: Declaring Enumeration With First Three Prime Numbers?

Jun 18, 2013

I would like to declare an enumeration with the first three prime numbers. For example

enum { THE_FIRST_PRIME = 2, THE_SECOND_PRIME = 3, THE_THIRD_PRIME = 5 };

What would be the best names for these enumerators? Or the names I used are good enough?

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C++ :: How To Define Enumeration Inside A Structure And Use It In Other File

Mar 5, 2014

I want to define enumeration inside a structure and use it in some other file

for eg

header.h
typedef struct dummy {
typedef enum {
ZERO,
ONE,
MAX
} NUMBERS;
// some member variables
} DUMMY; // end of the structure

otherfile.cpp

in this file i want to access both enumerations(for eg) ONE as well as the type NUMBERS.

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C++ :: Difference Between F And Fn

Jan 26, 2013

#include <functional>
using namespace std;

template<typename...Args>
void on(function<void(Args...)> f) {
function<void(Args...)> fn; // this line causes error C2059: syntax error : '<fake-expression>'
}
int main() {
function<void()> f;
on(f);
}

What's the difference between 'f' and 'fn'?

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C++ :: Difference Between Int And Short Int

Aug 19, 2014

size of int is 2 bytes and of short int is also 2 bytes.The range of values for int and short int are the same.

Then why int and short int are used? only int or short int is enough ....

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C# :: Difference Between Char And Int

Feb 5, 2015

Creating a C# program to prompt the user to choose the correct answer from a list of answer choices of a question and if the answer is wrong then try to prompt the same question again with do while loop but it is not working as it suppose to be.

class Program
{
static void Main(string[] args {
char UserChoice = ' ';
do {
Console.WriteLine("What is the command keyword to exit a loop in C#?");
Console.WriteLine("a.quit");
Console.WriteLine("b.continue");

[Code] ....

But if i use int instead of char in this program and replace a, b, c and d with 1, 2, 3 and 4 then this program work fine. What is wrong in this code when using char

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C/C++ :: Difference Between Two Dates?

Oct 26, 2013

How i can easly calculate the difference between two dates ?

Example :

Date 1 = 12 March(3)
Date 2 = 24 November(11)

Result = 258 days

how to do this in C++ ?Btw i don't want to use date functions or something like that.I want to do it with simple math formula.

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C/C++ :: Difference Between Int And Double?

Jul 31, 2013

#include<iostream>
using namespace std;
int main() {
    double x,i;
    cout<<"Enter the value of the number

[Code] ....

why I am not getting exact square root if I take x as double,but if I am taking it as int I got the correct result.

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C++ :: Difference Between HAS-A And IS-A Relationship?

Mar 20, 2014

What is the difference between HAS-A and IS-A relationship?

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C :: Difference Between Two Int Main Functions

Feb 6, 2014

I just wanted to know what's the difference between these two types of main functions:

Code: int main (int argc, char** argv){ ... }

Code: int main (int argc, char* argv[]){ ... }

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C :: Difference Between Structures And Unions

Aug 12, 2014

I am new to programming.. What is the difference between structures and unions in C

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C++ :: Difference Between Cout And Cerr

Oct 30, 2013

Other than the theoretical difference between cout and cerr where the former puts values to the monitor and the latter puts values related to errors to the monitor, is there any real difference here? Why not use cout when you want to send anything to monitor? Why use cerr at all?

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C++ :: Difference Between Iterator And Pointer

Jan 21, 2013

I just figured out that some std functions (for example: copy) need the resource and target objects have iterators to work. Otherwise, the compiler rejects. In case of two arrays, declared as:

double myA[100] = {};
array<double, 100> myB = {};

myA[0] is like a pointer, myB.begin() an iterator, if I do not make any mistake. So, what is exactly the difference between the pointer and the iterator here? They all give the access to elements.

If I need the target of copy to be an array like myA which cannot give an iterator, is there a way to make the command "copy" work for it?

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C++ :: Difference Between Strings And Arrays?

Apr 10, 2013

What is the diff between strings and arrays? Here is sample:

By String:

#include <iostream>
#include <string>
using namespace std;
int main () {
string mystr;

[Code] .....

By arrays:

#include <iostream>
using namespace std;
int main () {
char name[256], title[256];

[Code] ....

which is preferable and can i pick characters one by one in string?

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C++ :: Inverted Difference Triangle

Jun 21, 2013

Similar to Pascal’s triangle, the difference triangle has some interesting properties that find applications in various fields of the natural and applied sciences. In simple terms, a difference triangle is a set of integers arranged in an inverted triangle where each inverted triangle triad has its lower element equal to the difference (absolute value) of the two elements in the upper row. A difference triangle can be created from a sequence of integers forming the uppermost row by iteratively taking differences between consecutive terms to form the next row until a single-element row is created.

Example Consider the sequence 5, 8, 13, 21, 34, 55 from the Fibonacci series as the uppermost row of the difference triangle. The difference between successive elements form a new set: 3 (= 8 – 5), 5 (= 13 – 8), 8 (= 21 – 13), 13 (= 34 – 21), and 21 (= 55 – 34). The process can then be repeated until there is only one element left giving the following difference triangle:

5 8 13 21 34 55
3 5 8 13 21
2 3 5 8
1 2 3
1 1
0

Problem Write a program that forms a difference triangle using a given series of numbers as topmost row.

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C++ :: Difference Between Erase And Clear

Apr 4, 2014

vector<int> *vec; allocate memory and

suppose vec conatins 10 values then

erase(vec->begin(),vec->end());

vec.clear();

both should be used or any one one is fine to erase all ??

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C++ :: Difference Between CMOS And Bipolar?

Jan 11, 2013

I know this isnt the correct forum to put this in but i dont know where else to post this and get a quick answer...

Im looking up logic gates and theres a option between bipolar and CMOS and i was wondering whats the differnce

For example
NAND Gate 4 Element 2 Input CMOS 14-Pin Plastic Dip Tube
NAND Gate 4 Element 2 Input Bipolar 14-Pin Plastic Dip Tube

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C/C++ :: Computing Bit Difference Between Two Arrays?

Jul 23, 2014

#include <stdio.h>
#include <stdlib.h>
int b_diff (int, int);

[Code].....

I am trying to take two arrays H[], and V[] and call each element to compute the bit difference(Hamming distance) and return that back to the main function to be used in calculating pixel_phase and pixel_smoothing. I'm getting an error that bit_diff cannot be used as a function and I've tried renaming it but nothing seems to work.

[ int b_diff (int a, int ] is how it should actually look.int b_diff (int a, int is how it should actually look).

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C++ :: Calculating The Time Difference?

Mar 5, 2014

I want to find out the time difference,say i start walking from my home at 23 hr 10 min 25 seconds and I reach destination at 1 hr 10 min 25 seconds.. I know here the time difference is 1 hr 55 min 55 seconds. But how am I gonna calculate this?

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C++ :: Difference Between Methods And Objects?

Feb 2, 2014

What is a method and what is an object?

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C/C++ :: Difference Between Class And Structure

Mar 16, 2014

what is the difference between a class and a structure(struct)...when to use class and when to use struct???

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C/C++ :: Difference Between Auto And Decltype In 0x

Jun 7, 2012

I'm having trouble with auto and decltype.

 void f(const vector<int>& a, vector<float>& b) {
        typedef decltype(a[0]*b[0]) Tmp;
        for (int i=0; i < b.size(); ++i) {
          auto p0 = new auto(a[i]*b[i]);
          auto p1 = new decltype(a[i]*b[i]);

[Code] ....  

The above code runs well in GCC4.7.

Could I use 'new auto(a[0]*b[0])' to allocate memory for the type of a[0]*b[0]?

And I can not distinguish the difference between decltype and auto in this case.

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C/C++ :: Difference Between Parameter And Argument?

May 26, 2014

difference between an argument and parameter...understanding the difference between these two.

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C/C++ :: Difference Between Fork And Vfork?

Apr 15, 2014

when to use fork and vfork? I am using execl in my child. which one I need to use?

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C++ :: Difference Between Vectors And Arrays?

May 30, 2012

Is there a difference between vectors and Arrays? If I know arrays well and I can deal with them dynamically, do I have also to know about vectors ?

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