Concept explainers
- A)
Pointer:
Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.
- Pointer is a special type of variable to store the address of the memory location, which can be accessed later.
- If an asterisk “*” operator is present before the variable, then that variable is referred as pointer variable.
- It is also called as dereferencing or indirection operator.
- Pointer is just a type of variable that stores the addresses of other variables.
- Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.
Syntax of pointer variable declaration:
<variable-type> *<variable-name>;
Mathematical Operations that are allowed in a pointer:
- The math operation that is allowed for a pointer variable is “addition” and “subtraction”.
- Addition operation: The addition operation is performed using the “+”, “++”, “+=” operators.
- Subtraction operation: The subtraction operation is performed using the “-”, “--”, “-=” operators.
- The addition and subtraction operations are possible because the size of the pointer variable gets added or subtracted based on the data type it is being defined.
- Other math operations such as “multiplication” and “division” cannot be performed on a pointer variable because there is a possibility of garbage value or unallocated out range value being returned.
- B)
Pointer:
Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.
- Pointer is a special type of variable to store the address of the memory location, which can be accessed later.
- If an asterisk “*” operator is present before the variable, then that variable is referred as pointer variable.
- It is also called as dereferencing or indirection operator.
- Pointer is just a type of variable that stores the addresses of other variables.
- Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.
Syntax of pointer variable declaration:
<variable-type> *<variable-name>;
Mathematical Operations that are allowed in a pointer:
- The math operation that is allowed for a pointer variable is “addition” and “subtraction”.
- Addition operation: The addition operation is performed using the “+”, “++”, “+=” operators.
- Subtraction operation: The subtraction operation is performed using the “-”, “--”, “-=” operators.
- The addition and subtraction operations are possible because the size of the pointer variable gets added or subtracted based on the data type it is being defined.
- Other math operations such as “multiplication” and “division” cannot be performed on a pointer variable because there is a possibility of garbage value or unallocated out range value being returned.
- C)
Pointer:
Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.
- Pointer is a special type of variable to store the address of the memory location, which can be accessed later.
- If an asterisk “*” operator is present before the variable, then that variable is referred as pointer variable.
- It is also called as dereferencing or indirection operator.
- Pointer is just a type of variable that stores the addresses of other variables.
- Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.
Syntax of pointer variable declaration:
<variable-type> *<variable-name>;
Mathematical Operations that are allowed in a pointer:
- The math operation that is allowed for a pointer variable is “addition” and “subtraction”.
- Addition operation: The addition operation is performed using the “+”, “++”, “+=” operators.
- Subtraction operation: The subtraction operation is performed using the “-”, “--”, “-=” operators.
- The addition and subtraction operations are possible because the size of the pointer variable gets added or subtracted based on the data type it is being defined.
- Other math operations such as “multiplication” and “division” cannot be performed on a pointer variable because there is a possibility of garbage value or unallocated out range value being returned.
- D)
Pointer:
Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.
- Pointer is a special type of variable to store the address of the memory location, which can be accessed later.
- If an asterisk “*” operator is present before the variable, then that variable is referred as pointer variable.
- It is also called as dereferencing or indirection operator.
- Pointer is just a type of variable that stores the addresses of other variables.
- Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.
Syntax of pointer variable declaration:
<variable-type> *<variable-name>;
Mathematical Operations that are allowed in a pointer:
- The math operation that is allowed for a pointer variable is “addition” and “subtraction”.
- Addition operation: The addition operation is performed using the “+”, “++”, “+=” operators.
- Subtraction operation: The subtraction operation is performed using the “-”, “--”, “-=” operators.
- The addition and subtraction operations are possible because the size of the pointer variable gets added or subtracted based on the data type it is being defined.
- Other math operations such as “multiplication” and “division” cannot be performed on a pointer variable because there is a possibility of garbage value or unallocated out range value being returned.
- E)
Pointer:
Pointer, the name itself references the purpose of the pointer. Pointers point to a location in memory.
- Pointer is a special type of variable to store the address of the memory location, which can be accessed later.
- If an asterisk “*” operator is present before the variable, then that variable is referred as pointer variable.
- It is also called as dereferencing or indirection operator.
- Pointer is just a type of variable that stores the addresses of other variables.
- Using pointers, we can access the address of a variable; the data stored in that variable can be retrieved.
Syntax of pointer variable declaration:
<variable-type> *<variable-name>;
Mathematical Operations that are allowed in a pointer:
- The math operation that is allowed for a pointer variable is “addition” and “subtraction”.
- Addition operation: The addition operation is performed using the “+”, “++”, “+=” operators.
- Subtraction operation: The subtraction operation is performed using the “-”, “--”, “-=” operators.
- The addition and subtraction operations are possible because the size of the pointer variable gets added or subtracted based on the data type it is being defined.
- Other math operations such as “multiplication” and “division” cannot be performed on a pointer variable because there is a possibility of garbage value or unallocated out range value being returned.
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Starting Out with C++ from Control Structures to Objects (9th Edition)
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