Questions and Answers
How to cin everything (including spaces)?
getline(cin, stringVar)
What is the cout operator?
What is the range of int variables?
+/- 2 billion (2,000,000,000)
How to initialize a constant?
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Is 'doubleVar = 36 * intVar' an int or double?
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What is ==?
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What is =?
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What is a function declaration?
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What is a function definition?
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What is ASCII order?
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How to compare floating point numbers?
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What is the order operators evaluated?
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Study Notes
Input and Output in C++
- Use
getline(cin, stringVar)to read input from the user that includes spaces.
Output Operator
- The
coutoperator is represented by the symbol>for outputting text and values to the console.
Integer Range
- The range of
intvariables spans approximately ±2 billion, specifically from -2,147,483,648 to 2,147,483,647.
Constant Initialization
- A constant variable is initialized using the identifier format
CONST_VAR.
Variable Type Evaluation
- When evaluating the expression
doubleVar = 36 * intVar, the resulting type is anintbut may be displayed as adoublewith decimal points (e.g., 36.00).
Equality Operator
- The
==operator is used to check if two values are equal.
Assignment Operator
- The
=operator serves as the assignment operator, used to assign values to variables.
Function Declaration
- A function declaration follows the format:
return type function name (parameter list);indicating its return type, name, and parameters.
Function Definition
- A function definition is structured as:
return type function name(parameter list) { code of function }, containing the implementation details.
ASCII Order
- In ASCII, characters are ordered from
0-9, followed byA-Z, and thena-z, indicative of numerical and alphabetical sorting.
Comparing Floating Point Numbers
- For comparing floating point values, avoid using
==or!=. Instead, usefabs(x - y) < 0.0001to check for equality andfabs(x - y) > 0.0001to check for inequality.
Operator Precedence
- The order of operators evaluated in expressions follows this hierarchy: parentheses
( ), logical NOT!, arithmetic operations, and then relational operators like>.
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Description
Test your knowledge on the basics of C++ programming with these flashcards from EECS 183. Each card covers fundamental concepts such as input/output streams, data types, and variable initialization. Perfect for preparing for Exam 1!
