C++ Programming

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C-style arrays can be used as data members, both as fixed-size arrays or as dynamic arrays. The following examples demonstrate how they could be used as one-dimensional data members.

class a {

private:

int b[10] {0}; // in-class initialisation (all elements zero).

public:

int& operator[] (unsigned index) {

if (index>=10) throw std::range_error();

return b[index]; }

};

class c {

public:

c (unsigned sz=10): size(sz), p (size?new int[size]:nullptr) {

memset (p, 0, size); }

c (const s& _s): size(_s.size), p (size?new int[size]:nullptr) {

if (size) memcpy (p, _s.p, size); }

c (s&& _s): size(_s.size), p (_s.p) { _s.p=nullptr; } // swap resources

c& operator= (const s& _s) {

if (p) delete [] p;

size = _s.size;

p = (size?new int[size]:nullptr);

if (size) memcpy (p, _s.p, size); }

c& operator= (s&& _s) {

size = _s.size;

p = _s.p;

_s.p=nullptr; } // swap resources

~c() { if (p) delete [] p; }

int& operator[] (unsigned index) {

if (index>=size) throw std::range_error();

return p[index]; }

private:

unsigned size {0};

int* p {nullptr};

};

A much simpler approach would be to use std::array<int> and std::vector<int> instead of primitive C-style arrays.

Classes has two meanings here. If you mean classes as in education, then I know of no free online classes. There are plenty of sites that will give tutorials free of charge, but it is best if you buy a comprehensive book on the subject and learn the basics of the generic language first. Then use the sites to gain a better understanding of the platform-specific features available in your IDE. If you mean classes as in data types that you can freely use in your programs, there are many sources available. Most come in the form of example code, many of which can be found in all the popular C++ forums and peer groups, but you can also download open source libraries for free.

To determine if an array is symmetric, the array must be square. If so, check each element against its transpose. If all elements are equal, the array is symmetric.
For a two-dimensional array (a matrix) of order n, the following code will determine if it is symmetric or not:

template
bool symmetric(const std::array, n>& matrix)
{
for (size_t r=0 ; rfor (size_t c=0; cif (matrix[r][c] != matrix[c][r]) return false; // not symmetric!
return true! // symmetric!
}

If this is a homework related question, you really should consider trying to solve it yourself before looking at this answer. Otherwise, the value of the lesson, and the reinforcement provided by the assignment, will be lost to you.

You do not create individual elements of arrays in C or C++. You create the array, and then reference the elements. Say you want to create a 10 x 20 array of floats. You would declare float MyFloatArray[10][20]. You would then reference the elements, such as MyFloatArray[3][8]. Note that 10 and 20 are the number of elements in each direction, but the valid range of indices is 0 to 9 and 0 to 19, respectively.

Turbo C++ is a 16-bit application. If you change graphics mode and move the mouse, or try to create a named pipe, NTDVM.exe will stop responding. A hotfix is available from the Microsoft knowledge base, KB2732488.

Members can be declared anywhere within a class declaration, and in any order.

Some programmers like to keep data member declarations at the top of the class declaration, either before or after the constructors, while others prefer them at the very bottom, but it really doesn't matter where they are placed as long as they appear somewhere (with an appropriate private, protected or public access specifier).

The order they are declared is generally only of importance when debugging, as the order of declaration generally dictates the order in which they are presented by the debugger's watch windows. Many debuggers will list the first few member variables without the need to expand the class completely, thus the variables that are of most interest should be placed before those of less interest.

In C++, data is not secured from the outside world it is merely protected from accidental mutation. A determined programmer can easily circumvent the encapsulation of an object. Consider the following:

class X {

int data; // private by default

};

Here, the data member is declared private (the default access for a class), however the class definition exposes the implementation details making it possible to define the exact same class with public access under a different name:

struct Y {

int data;

};

Given that X and Y both have the same memory layout, it is trivial to undermine the encapsulation of an X by casting to a Y:

void f (X& x) {

x.data = 42; // error: x.data is private

Y& y {(Y&) x}; // refer to x as if it were really a Y with pubic access

y.data = 42; // ok

}

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The difference between fixed partition and dynamic partition... For the case of disk partitions: Fixed partitions are defined in the master boot record, or in one of its chains that define logical partitions in an extended partition. As such, they are known at boot time and, if the operating systems recognize them, they can be shared between multiple installations, such as Windows and Linux. Dynamic partitions are defined by the operating system. They are defined out of unallocated drive space and, as such, are not known at boot time. They can not generally be shared between different installations. Also, unless the operating system using dynamic partitions makes at least its allocations known to the boot record, any attempt to manage disc space using both techniques is dangerous. For the case of analysis and programming: Partitioning is a technique used to break data up into managable pieces. Binary Search, for instance, partitions an array into successively smaller pieces as it narrows its search space down. Sorting can also partition data, sorting each partition and then sorting the partitions. Quick Sort and Merge Exchange Sort are examples of that. Statistical analysis may also partition data. The list is endless. Addressing the specific question, then, static partitioning is breaking the data up into fixed sized pieces, while dynamic partitioning makes the piece size variable, often as a consequence of the results as they evolve.

It is where you leave school or otherwise find a way to avoid going to that particular class.

Unless it was on the NFA list before 1986, maybe 800 USD.

Then all the threads and all the instances of the class that contain the static variable would see the new value. Please make sure that you address any concurrent access (synchronization) issue that might appear.

when elements are accesed or placed in contiguous memory location yhen data structure is known as linear data structure. stacks, arrays, queues and linklists are example of data structure.

in non-linear data structure element are not placed in sequential manner. trees, graph are the ex. of non-linear data structure.

Steganography is good with JAVA because JAVA is a highly secured language.

If we use steganography with JAVA, it will enforce multiple levels of security of data.

form: RISHU

Structures are public by default while classes are private by default. Classes are generally more beneficial as the encapsulation dictates the object's purpose, and data hiding ensures the data remains valid. But the ability to emit a structure from an object and vice versa simply adds to the overall flexibility, giving you the best of both worlds whenever needed.

Breadth first search can be performed upon any tree-like structure. A binary tree is a typical example. A breadth first search begins at the root and searches the root's children, then all its grandchildren, and so on, working through one level of the tree at a time.

To change the values in an array in C++ you simply assign values to the appropriate elements:

// Zero-initialise an array of 10 integers:

std::array<int, 10> a {0};

// Assign values to individual elements by index:

a[0] = 2;

a[1] = 3;

a[2] = 5;

a[3] = 7;

a[4] = 11;

a[5] = 13;

a[6] = 17;

a[7] = 19;

a[8] = 23;

a[9] = 27;

// Iterate through the indices:

for (size_t index=0; index<a.size(); ++index) {

a[index] = random_integer();

}

// Iterate elements by reference using a ranged-for loop:

for (auto& elem : a)

{

elem = random_integer();

}

Note that the suffix operator [] can also be used with C-style arrays. For example:

int a[10] {0};

a[0] = 2;

a[1] = 3;

a[2] = 5;

// etc...

You don't add it to code blocks, you include it in your own code. If your compiler can't find it, specify the relative path -- relative to the source file.