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In our last article, we introduced you to the unformatted and formatted input functions. In this article, we are only going to focus on unformatted output functions. Unformatted console output functions are used for performing output operations at console.


Some of the most important formatted console output functions are -

Functions	Description
put(char ch)	Reads a single character from the user at the console, and returns it.
write(char *arr, int num)	Writes a number of characters in a char array to the console.

How to access these unformatted output functions?

• In C++, we can write the output at console using an object cout of ostream class and through this object we can access the functions of ostream class mentioned above i.e. - put(char *), write(char *arr, int num).






• Using put(char ch) function to display a char.


Using the put(char ch), we can display a single character value(stored in a char variable) at the console. Let's see the syntax of put(char ch) function -



put(char ch);


The put(char ch) function displays a character value at the console using ostream object, cout.



// Using put(char ch) function to display a character in C++

#include<iostream8>

using namespace std;

int main()
{
char ch = 'H';
cout<<"Displaying a char value : ";
cout.put(ch);

cout<<"\nDisplaying another char value : ";
cout.put('X');

}






Output




Displaying a char value : H
Displaying another char value : X




• As you can see in the example, first we have displayed the value of a char variable and secondly we have directly displayed a char value.





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• Using write(char *arr, int num) function


Using the unformatted output function write(), we can display the contents of a char array at the console. Let's see the syntax of write() function -



write(char *arr, int num);


The write() function pulls the string entered at the console using istream object cin and stores into a c-style char array, with the maximum length.



// Using write(char *arr, int num) function to read a string in C++

#include<iostream8>

using namespace std;

int main()
{
char arr1[] = "Hello World";
cout<<"Displaying the first 5 characters of char array : ";
cout.write(arr1,5);

cout<<"\nDisplaying the first 10 characters of char array : ";
cout.write(arr1,10);

}






Output




Displaying the first 5 characters of char array : Hello
Displaying the first 10 characters of char array : Hello Worl



As you can in the example, we have created a char array, which is used to store a multi-word string. This char array is displayed using the write(char* array, int num) to display a particular number of characters in this char array. This function is accessed by the cout object of ostream class.





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