cpp-input-output Archives

How to Output Error When Input Isn't a Number in C++?

Last Updated: 19 February 2024

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 th...read more

How to Take std::cin Input with Spaces?

Last Updated: 01 March 2024

In C++, std::cin is used to accept the input from the standard input device. By default, the delimiter used by std::cin to separate input is a whitespace. In this article,...read more

How to Take Multiple Input from User in C++?

Last Updated: 14 February 2024

In C++, we use cin when we want to take input from the user. We often also need to take more than one input at a time. In this article, we will learn how to take multiple ...read more

How to Read Multiple Numbers from a Single Line of Input in C++?

Last Updated: 14 February 2024

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 num...read more

How to Read a File Using ifstream in C++?

Last Updated: 28 April 2025

In C++, we can read the contents of the file by using the ifstream object to that file. ifstream stands for input file stream which is a class that provides the facility t...read more

How to Handle Multiple String Inputs with Spaces in C++?

Last Updated: 18 March 2024

In C++, strings are a sequence of characters that might contain spaces in many casesbut we can read only the input text till whitespace using cin. In this article, we will...read more

How to Use stringstream for Input With Spaces in C++?

Last Updated: 06 July 2024

In C++, thestd::stringstreamclass is a stream class to operate on strings and is very useful when we want to operate on a string as if it were a stream (like cin or cout)....read more

Why Does std::getline() Skip Input After a Formatted Extraction?

Last Updated: 03 April 2024

In C++, thestd::getline()function is a common method for reading a line of text from an input stream. However, when used after a formatted extraction operation, it may som...read more

How to Handle Wrong Data Type Input in C++?

Last Updated: 03 April 2024

In C++, when we’re expecting a certain type of input but the user enters a different type then such input is called incorrect data input and it can cause issues like unexp...read more

How to use setprecision in C++?

Last Updated: 17 May 2024

In C++, we have astd::setprecision function which is a part of the iomanip library. It is used to set the number of decimal places to be displayed for a floating-point num...read more

How to use the setw Manipulator in C++?

Last Updated: 17 May 2024

In C++, thestd::setwmanipulator, which stands for “set width”, is a function provided by theiomaniplibrary. The width of the field in which the output of the subsequent va...read more

How to Validate User Input in C++

Last Updated: 27 May 2024

Validating the user input is very important for any program to ensure that the data being processed is correct and meaningful. In C++, various techniques can be used to va...read more

How to Use cin.fail() Method in C++?

Last Updated: 28 May 2024

In C++, thecin.fail()method is a part of iostreamlibrary that is used to check whether the previous input operation has succeeded or not by validating the user input.In th...read more

How to Change Console Color in C++?

Last Updated: 05 June 2024

In C++, most of the inbuilt input and output functions take input and show output from/to the console window. This can be useful for highlighting important information, cr...read more

Error: std::endl is of Unknown Type when Overloading Operator <<

Last Updated: 22 July 2024

In C++, the operator is commonly overloaded for custom output for user-defined types using streams. However, an issue may arise when using std::endl with an overloaded op...read more

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