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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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Chapter 9 Solutions
Starting Out with C++ from Control Structures to Objects (8th Edition)
- Which is 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_forwardA 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_forwardPointers can be compared using the == operator. A) True B) Falsearrow_forward
- Lowest 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_forwardWhich is correct with respect to the size of the data types?a) char > int < floatb) int < char > floatc) char < int < floatd) char < int < doublearrow_forwardC++ Array Expander -Just do everything in main and make sure you comment each step Use Pointer Notation for the function and within the function. Use a main function and return the pointer from the ArrayExpander function to mainarrow_forward
- Pointers Consider the following program: int a - 3; int main(void) int *b = &a; a- 4; int a = 6; int *c = &a; *C= 7; int d = *b + *c; return e; What integer is in variable d just before main returns?arrow_forwardC++arrow_forwardc++ Write a function that returns a float value. The function will check the users entry. It will return a float value which is between 0 and 100 and is divisible by 17 If entered value is not a float, display “Error!!! Not a number”. If the number is out of range display “Error!!! Outside the range”. If the number is not between the range, the users will be prompted to enter another number. It will return only a valid numberarrow_forward
- The following function has errors. Locate as many errors as you can. void getValue(int value&) { cout << "Enter a value: "; cin >> value&;}arrow_forwardAssignment: Write four different functions: a) void SelectionSort(Data *A, int N), where A is the array and N is number of data in the array. Data is the datatype, which you can declare first as a global declaration, by using typedef int Data; This helps by changing the datatype of the data to be sorted easily. b) int Min(Data *A, int start, int N); // this will retun the index min, for the smallest data from the data set A[start] to A[N-1] c) void InsertionSort(Data A, int N): d) void PrintArray(Data * A, int N); // when called this function will display all the data in the array A Also, write the driver function (i.e. the main), main should do the following: i) Declare the array dynamically, so that memory can be used efficiently. To declare an array dynamically, the following steps may be used: • Declare a pointer of type Data Data * A; • Declare number of data N, and read a value for N • Allocate memory A = new Data [N] ii) Prompt the user to enter N number of data, and store those…arrow_forwardTRUE OR FALSE, C++ When passing an array to a function, you must include & in front of the array name. When passing an array to a function, you must include & in front of the array name. It is possible to have a 2-dimensional array where each row has a different number of columns. The * is called the address of operator.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
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