C++ Tutorial Index

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C++ Control Statements

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C++ Functions

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Single dimension array Two dimension array

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C++ Inheritance Single level Inheritance Multilevel Inheritance Multiple Inheritance Hierarchical Inheritance Hybrid Inheritance

C++ Polymorphism

C++ Polymorphism C++ Overloading C++ Overriding C++ Virtual Function

C++ Pointers

C++ Pointers C++ this pointer

C++ Exception Handling

C++ Exception Handling

C++ Constructors

C++ Constructors Default Constructor Parameterize Constructor Copy constructor Constructor Overloading Destructor

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C++ File Handling C++ Writing to file C++ Reading file C++ Close file

Miscellaneous

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Passing by the pointer in C++ Free vs delete() in C++ goto statement in C and C++ C++ program to read string using cin.getline() C++ String Concatenation Heap Sort in C++ Swap numbers in C++ Input Iterators in C++ Fibonacci Series in C++ C ++ Program: Alphabet Triangle and Number Triangle C++ Program: Matrix Multiplication C++ Program to Print Fibonacci Triangle Stack in C++ Maps in C++ Queue in C++ C++ Bitset C++ Algorithms Priority Queue in C++ C++ Multimap C++ Deque Function Pointer in C++ Sizeof() Operators in C++ C++ array of Pointers free() Vs delete in C Timsort Implementation Using C++ CPP Templates C++ Aggregation C++ Enumeration C++ Math Functions C++ Object Class C++ Queue Initialize Vector in C++ Vector in C++ C++ STL Components Function overloading in C++ C++ Maximum Index Problem C++ find missing in the second array C++ Program to find the product array puzzle C++ Program To Find Largest Subarray With 0 Sum C++ Program To Move All Zeros To The End Of The Array C++ Program 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in C++ Factorial Program in C++ Function in C++ Hexadecimal to Decimal in C++ Octal to Decimal in C++ Reverse a Number in C++ Structure Vs Class in C++ C++ Forward Iterators C++ Output Iterators C++ Prime number program Char Array to String in C++ Constructor Overloading in C++ Default arguments in C++ Different Ways to Compare Strings in C++ Dynamic Binding in C++ Program to convert infix to postfix expression in C++ SET Data Structure in C++ Upcasting and Downcasting in C++ Reverse an Array in C++ Fast Input and Output in C++ Delete Operator in C++ Copy elision in C++ C++ Date and Time C++ Bitwise XOR Operator Array of sets in C++ Binary Operator Overloading in C++ Binary Search in C++ Implementing the sets without C++ STL containers Scope Resolution Operator in C++ Smart pointers in C++ Types of polymorphism in C++ Exception Handling in C++ vs Java Const Keyword in C++ Type Casting in C++ Static keyword in C++ vs Java Inheritance in C++ vs Java How to concatenate two strings in C++ Programs to Print Pyramid Patterns in C++ swap() function in C++ Structure of C++ Program Stringstream in C++ and its applications rand() and srand() in C / C++ C++ Ternary Operator C++ Scope of Variables While Loop Examples in C++ Star pattern in C++ using For Loops For Loop Examples in C++ Do-While Loop Examples in C++ Top 5 IDEs for C++ That You Should Try Once Assertions in C/C++ C++ Convert Int to String Continue in C++ While loop Diamond Pattern in C++ using For Loop How to Reverse a String in C++ using Do-While Loop How to Reverse a String in C++ using For Loop How to Reverse a String in C++ using While Loop Infinite loop in C++ Loops in C++ Returning Multiple Values from a Function using Tuple and Pair in C++ wcscpy(), wcslen(), wcscmp() Functions in C++ Auto keyword in C++ C++ 11 vs C++ 14 vs C++ 17 C++ STL (Standard Template Library) Differences Between C Structures and C++ Structures Divide by Zero Exception in C++ Dynamic Constructor in C++ Dynamic Memory Allocation in C++ Find the Size of Array in C/C++ without using sizeof() function Floating Point Operations and Associativity in C, C++ and Java Hello World Program in C++ How to create a table in C++ How to Setup Environment for C++ Programming on Mac Implementation of a Falling Matrix in C++ Message Passing in C++ Pointer to Object in C++ Templates in C++ vs Generics in Java Ways to Copy a Vector in C++ What does Buffer Flush mean in C++ sort() function in C++ Structure Sorting (By Multiple Rules) in C++ Similarities between C++ and Java std::distance in C++ Array program in C++ C++ Tricks for Competitive Programming Desired Capabilities in Selenium Web Driver in C++ Socket Programming in C++ Template Specialization in C++ Classes and Objects in C++ Convex hull Algorithm in C++ DES in C++ C++ vardiac() function Difference between Two Sets in C++ Difference between Exit and Return Structured Binding in C++ Differences between Local and Global Variable Bitwise Operator vs Logical Operator Difference 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in C/C++ Depth First Search Program to Traverse a Graph in C++ Features and Use Of Pointers in C/C++ Fread Function in C++ Programming Fscanf Function in The C++ Functions in C++ With Types and Examples Gmtime Function in C/C++ How is Multiset Implemented in C++ How to Build a Program in C++ How to Declare a 2d Array Dynamically in C++ inheritance Program in C++ int Max and int Min in C/C++ is It Fine to Write Void Main Or Main in C/C++ How to create a button in C++ abs() function in C++ Compile Time Polymorphism in C++ Division in C++ Factorial of a Number in C++ using while Loop Multiset in C++ 4 Pillars of OOPs Approach in C++ Backtracking Time Complexity in C++ C++ Global Variable C++ Pipe Tutorial Observer Design Pattern in C++ Private Inheritance in C++ Pthread in C++ Parameters SDL library in C++ with Examples Pointers in C++ Abstract Factory Design Pattern in C++ Ascending order in C++ How the value is passed in C++ Call by Pointer in C++ Constexpr in C++ Deadlock in C++ Design 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COUT COMMAND IN C++ LANGUAGE

Introduction:

Character (C) + Output (Out) = Character Output (Cout). In C++, the court object represents an instance of the stream class. The attribute is declared within the iostream header file.”

In C++ programming language, the output of an program is shown on the screen via cout. The characters 'c' & 'out' in cout represent characters and output, respectively. Character output is thus denoted by cout. To output structured data, we utilize cout in conjunction with the insertion operator. The iostream header file contains the C++ definition for cout. We need to include namespace std into our code in order to use cout. In the absence of it, our program would have to use std::cout rather than cout.

In C++ programming language, cin, and cout are actually object-oriented and provide type-safe input as well as output; they are regarded as a user-friendly method of performing input as well as output in C++ programming language. The "<<" operator is employed to show the result on display, which is a common output device. It is connected to the stdout standard C output stream. The insertion operator (<<) is utilized for inserting the data that has to be displayed on the screen into the standard output stream ( cout ).

Syntax for Cout in C++ language:

The following syntax will show us how to use cout in C++:

cout << output

Here, the result is printed using the C++ insertion operator <<. Subsequently, the output required will be displayed on the screen. This output could be a constant, variable, element inside an array, or any of the elements of a container (set, map, etc.).

Exceptions for Cout in C++ language:

The only kind of output that cout can provide is for primitive data types if we attempt to process non-primitive data types structures, classes, etc. We will receive an exception. We must overload the << operator in order to prevent the mistake.

Example for using cout command:

We'll use the following example to show how to utilize C++ through assigning a variable's value and then printing that variable.

Code:

# include <iostream>

using namespace std;

int main () {

    int var;

    var = 100;

    cout << var;

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

In the code above, we called our variable var; then we gave it its value as 100. By employing cout, we displayed the variable on the screen. Therefore, the output showed the variable's value, which is 100.

What does C++'s Cout mean?

We must first comprehend what streams constitute in order to fully understand the cout parameter. A series of bytes is referred to as a stream in C++. They enter and exit the program. In C++, the different operations for input and output are handled by the stream classes. The header file contains these classes. Both input as well as output streams are the two different types of streams. The stream class manages an input stream, whereas the ostream class handles the output stream. Data bytes are transferred from the application into the device display via the output stream. The istream as well as the ostream classes both derive from the ios class. In C++, an object that belongs to the ostream class is called a cout object.

COUT COMMAND IN C++ LANGUAGE

As was previously mentioned, the output is shown on the screen via the standard output device, or cout. Since cout is a component within the iostream header file, it is also an aspect of the identical library as the ostream class. As a result, each time we need to utilize the cout object inside our program, we must add the isotream header file.

Data that is formatted as well as unformatted may both be utilized with cout. Unformatted data is simply unconverted bytes; formatted data represents data that has had its bytes changed into a specific data type, like float, int, etc. The insertion operator (<<) is utilized when executing cout through formatted data, while member functions (such as put ()) are employed when accessing cout through unformatted data.

COUT COMMAND IN C++ LANGUAGE

Now, let's look at how we could present our work better. For formatting our output, we make use of cout in conjunction with manipulators. Let's go over the most often utilized ones first:

  • setprecision: This command sets the float or decimal value's precision.
  • setw: This command sets the output operation's field width.
  • setfill: This command inserts a specific character into the stream.

If you utilize any of the manipulators listed above, make sure that your program includes the <iomanip> header file.

Additional Examples of Cout in C++:

Let's look at some more examples to show you how to make use of cout in C++.

Program 1: Write a program that prints each element in an array:

# include <iostream>

using namespace std;

int main () {

    int num;

    cin >> num;

    int array [ num ];

    for (int j = 0; j < num; j ++)

    {

        cin >> array [ j ];

    }

    for (int j = 0; j < num; j ++)

    {
cout << array [ j ] << " ";            

    }

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

Explanation: We display every element of an array with size n on the monitor after receiving input from it.

Program 2: Writing a Program to demonstrate how to use cout.precision ():

# include <iostream>

using namespace std;

int main () {

    double num;

    num = 2.578964;

    cout << num << endl;

    cout.precision ( 5 );

    cout << num << endl;

    cout.precision ( 3 );

    cout << num << endl;

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

Explanation: As shown in the program above, cout.precision ( int num ) fixes the value of the decimal to Num.

Program 3: Write a Program to show how to use cout.write ():

# include <iostream>

using namespace std;

int main () {

    int num;

    cin >> num;

    char array [ num ];

    for (int j = 0; j < num; j ++)

    {

        cin >> array [ j ];

    }

    cout.write (array, 4) << endl;

    cout.write (array, 1) << endl;

    cout.write (array, 5) << endl;

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

Explanation: The program mentioned above illustrates that, the character array's initial N elements are printed using the command cout.write ( char array, int N ). T

Program 4: Write a program to illustrate many insertion operators:

# include <iostream>

using namespace std;

int main () {

    int num;

    cin >> num;

    char array [ num ];

    for (int j = 0; j < num; j ++)

    {

        cin >> array [ j ];

    }

    cout << " The first element of the input array is : " << array [ 0 ] << " " << " The last element of the input array is : " << array [ num - 1 ];

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

Explanation: To print several outputs on the display, we can utilize multiple insertion operators. We call this as insertion operator cascading.

Program 5: Write a program to show how to use cout.put ():

# include <iostream>

using namespace std;

int main ()

{

    char array [7] = "klmngp";

    char x = 'k';

    cout.put ( x );

    cout << endl;

    x = 'm';

    cout.put ( x );

    return 0;

}

Output:

COUT COMMAND IN C++ LANGUAGE

Explanation: The character retained in the character variable x is printed using cout.put ( c ). The program mentioned above illustrates this.

Conclusion:

In this tutorial, we have covered briefly about the cout command in C++ programming language. To show output on the monitor, we make use of cout. Initially, we covered the details of both input and output commands which are cin and cout, then we discussed about cout command. The insertion operators (<<) are used for cout along with the formatted data. When dealing with unformatted data, we employ member functions like put () that utilize cout. Other member functions like cout.write (), cout.precision (), and others additionally make use of cout. When using cout, manipulators like set precision, setw, and other functions are utilized to format and improve the appearance of our output. Hope this information will provide value in your day to day programming life.