Stringstream is stream class present in C++ which is used for doing operations on a string. It can be used for formatting/parsing/converting a string to number/char etc. Hex is an I/O manipulator that takes reference to an I/O stream as parameter and returns reference to the stream after manipulation. Here is a quick way to convert any decimal to hexadecimal using stringstream:...

In C++, we often need to take input from the user by reading an input text line by line but the cin method only takes input till whilespace. In this article, we will look at how to read a full line of input in C++....

Given an integer N in form of string str consisting of more than 100 digits, the task is to store the value for performing an arithmetic operation and print the given integer.Examples:...

In C++, when taking user input, we may need to validate that it is a number and output an error if it is not. In this article, we will learn how to output an error when the input isn’t a number in C++....

The cin object in C++ is used to accept the input from the standard input device i.e., keyboard. it is the instance of the class istream. It is associated with the standard C input stream stdin. The extraction operator(>>) is used along with the object cin for reading inputs. The extraction operator extracts the data from the object cin which is entered using the keyboard....

In C++, taking string input is a common practice but the cin is only able to read the input text till whitespace. In this article, we will discuss how to read the multiple line of text input in C++....

Regular competitive programmers face common challenge when input is large and the task of reading such an input from stdin might prove to be a bottleneck. Such problem is accompanied with “Warning: large I/O data”. Let us create a dummy input file containing a line with 16 bytes followed by a newline and having 1000000 such lines, making a file of 17MB should be good enough....

In C++, when working with user inputs we often need to take input of multiple numbers from a user in a single line. In this article, we will learn how to read multiple numbers from a single line of input in C++....

In C++, we often ask for user input and read that input using the cin command and for displaying output on the screen we use the cout command. But we can also redirect the input and output of the cin and cout to the file stream of our choice....

The cin object in C++ is an object of class iostream. It is used to accept the input from the standard input device i.e. keyboard. It is associated with the standard C input stream stdin. The extraction operator(>>) is used along with the object cin for reading inputs. The extraction operator extracts the data from the object cin which is entered using the keyboard....

std::endl and \n both seem to do the same thing but there is a subtle difference between them....

What values do the printf() and scanf() functions return ?...