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Questions and Answers
What does the unary operator & return when used on a variable?
What is the difference between a pointer declared with 'const type * variable' and one declared with 'type * const variable'?
What is the purpose of the dereference operator * in a pointer declaration?
What is the relationship between pointers and arrays in C?
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What does the declaration 'const type * const variable' imply?
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Study Notes
Pointers
- Pointers are declared by using the asterisk symbol (*) before the variable name.
- Pointers can point to various types of data, such as integers, characters, or structures.
- There is a close relationship between pointers and arrays, as the name of an array is essentially a pointer to the first element of the array.
Reference and Dereference Operators
- The & operator is used to get the memory address of a variable, also known as the reference operator.
- The * operator is used to get the value stored at a memory address, also known as the dereference operator.
Pointer Declaration Scenarios
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type * variable: The variable can point to different locations, and the value at the location it points to can be changed. -
const type * variable: The variable can point to different locations, but the value at the location it points to cannot be changed. -
type * const variable: The variable cannot point to different locations, but the value at the location it points to can be changed. -
const type * const variable: The variable cannot point to different locations, and the value at the location it points to cannot be changed.
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Description
This quiz covers the basics of pointers in C programming, including declaration, types, and operators. Test your understanding of pointers and their relationships with arrays.
