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 (8th Edition)
- 2- In C++ language, every line of code must end with a semicolon. (True or False). 3- It is not possible to change the value of the pointer. (True or False). 4- If the following lines of code have errors, correct them; otherwise, write "no errors." for (int i=2; i<5; i++) { int s=i*2; } cout << S; 5- A function cannot be called from inside another function. (True or False). 6- How to make a function return multiple values? 7- Every class member is by default. (public, private, not public nor private) 8- Create an instance of the following class and call its methods. class Exam{ int grade; public: void seta (int b) (grade=b; } int geta () {return grade; } 9- When the word const is put before the variable definition, what does that mean? 10- How to concatenate two strings in C++ language? C++arrow_forwardYou can dereference a smart pointer with the * operator. True Falsearrow_forwardint *p; where p is a null pointer when:arrow_forward
- 3- It is not possible to change the value of the pointer. (True or False). 4- If the following lines of code have errors, correct them; otherwise, write "no errors." for (int i=2; i<5; i++) { int s=1*2; } cout << s; 5- A function cannot be called from inside another function. (True or False). 6- How to make a function return multiple values? 7- Every class member is by default. (public, private, not public nor private) 8- Create an instance of the following class and call its methods. class Exam{ int grade; public: void seta (int b) (grade=b; } int geta () {return grade; } 9- When the word const is put before the variable definition, what does that mean? 10- How to concatenate two strings in C++ language? C++arrow_forward16. NULL can be assigned to a void pointer. True O Falsearrow_forwardThe correct with respect to the size of the data types? a) char > int < float b) int < char > float c) char < int < float d) char < int < doublearrow_forward
- Assuming that ptr is a pointer to an int, what happens when you add 4 to ptr ?arrow_forwardQUESTION 1 Let a and b are pointers of type integers. Which one of the following statements is TRUE? a=b-10; printf("%d%d", *a, b); a= &b; printf("%d", *a+*b);arrow_forwardThe pointer variable is defined with: & operator % operator * operator. None of the answers are correct.arrow_forward
- A pointer variable cannot be: A Passed to a function as argument. B B Changed within the funcction. C Returned by a function. D Assigned as an integer value. Darrow_forwardLowest Score Drop Write a program that calculates the average of a group of test scores, where the lowest score in the group is dropped. It should use the following functions: void getScore() should ask the user for a test score, store it in a reference parameter variable, and validate it. This function should be called by main once for each of the five scores to be entered. void calcAverage() should calculate and display the average of the four highest scores. This function should be called just once by main and should be passed the five scores. int findLowest() should find and return the lowest of the five scores passed to it. It should be called by calcAverage, which uses the function to determine which of the five scores to drop. Input Validation: Do not accept test scores lower than 0 or higher than 100.arrow_forwardFill-in-the-Blank The __________ operator can be used to work with the variable a pointer points to.arrow_forward
- C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology PtrC++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning