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Questions and Answers
What are the values of A and B after this code snippet? int A, B; A = 2; B = 4; A = B + B / A; B = A * 5 + 3 * 2;
What header file is used to receive data from the keyboard and send output to the screen in C++?
iostream
What is the order of evaluation for the assignment operator in C++?
Right to left
A named constant in C++ is a memory location whose content cannot change during __________.
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All types of variables in C++ are initialized automatically.
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Match the following C++ data types with their examples:
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What must be done before manipulating data in memory?
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Study Notes
I/O Streams and Standard I/O Devices
- Input/Output: transfer of data as a sequence of bytes (stream of bytes) from the source to the destination
- Input stream: sequence of characters from an input device (like a keyboard) to the computer
- Output stream: sequence of characters from the computer to an output device (like a monitor)
- I/O operations are handled using the
iostreamheader file - The
iostreamheader file contains definitions for two data types:istreamandostream-
istream: input stream, uses the>>(extraction operator) -
ostream: output stream, uses the<<(insertion operator)
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Assignment Statements
- Assignment operator
=assigns a value to a variable - The assignment operator is evaluated from right to left
Variables, Assignment Statements, and Input Statements
- Variables must be initialized before they are used, but not necessarily during declaration
- Data must be loaded into main memory before it can be manipulated
- Storing data in memory is a two-step process:
- Instruct the computer to allocate memory
- Include statements in the program to put data into the allocated memory
Allocating Memory with Constants and Variables
- Named constants are memory locations whose content cannot change during execution.
- Named constants have advantages: variables that don't change but are used many times can be re-defined once at the start of the program, and the compiler will generate an error if you mistype the name of a variable (not the value)
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Description
This quiz explores the concepts of input/output streams and assignment statements in programming. It covers the usage of iostream, different types of streams, and how assignment operators function in code. Test your knowledge on these essential programming topics!
