CPlusPlus arrays and strings

Mr. A / 1 day ago

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CPlusPlus arrays and strings

CPlusPlus arrays and strings provide greater flexibility to store similar categories or types of

values like integers, characters, decimals or even strings(to be discussed later)

When we were using the variables in our previous post, what we were concluding was:

A variable hold single value of certain type(s). With the facility of arrays in C++, we can store

multiple values of same type which was not possible with normal variables. The values are

stored in indices of an array as shown below

// header file for input and output

#include <iostream>

// namespace to point towards methods

using namespace std;

int main()

{

// myArray of type integer holding 10 numbers

int myArray[10] = {1,2,3,4,5,6,7,8,9,10};

cout << endl;

// element at zeroeth index

cout << myArray[0];

return 0;

}

Output 1

Strings

An object that contains sequence of words is known as string. String plays a very important role

in C++ programming.

There are two types of strings om C++

C language type string

or

C++ language type modern string

Both arrays and strings occupy adjacent areas of memory. The array length is determined at the

design time but the string can change its length during the execution of a program.

/*In computer programming, a precompiled header is a (C or C++) header file that is compiled

into an intermediate form that is faster to process for the compiler. Usage of precompiled

headers may significantly reduce compilation time, especially when

applied to large header files, header files that include many other header files,

or header files that are included in many translation units.

*/

#include “stdafx.h”

// for input and output

#include <iostream>

// for our string variable

#include <string>

using namespace std;

int main ()

{

string MyStr;

cout << “What is your name ? “;

cin >> MyStr;

cout << “Hello ” + MyStr;

cout<< ” “;

return 0;

}

Output

What is your name? Adeel

Hello Adeel

C-string can not contain 0 as a character in them. C-strings are essentially null terminated

strings; hence the 0 contained in them is considered as end of the string. They can not hold 0

as character.

Important points

Windows is written in C++

Mac is written with Objective C but its kernel is in C and all IO PnP subsystem is Embedded

C++

Linux uses C language, other applications are written in C++