Problem 8. What is the correct syntax of declaring array of pointers of integers of size 10 in C++? a) int arr = new int[10]; b) int **arr = new int*[10]; c) int *arr = new int[10]; d) int *arr = new int*[10]
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Problem 8. What is the correct syntax of declaring array of pointers of integers of size 10 in C++?
a) int arr = new int[10];
b) int **arr = new int*[10];
c) int *arr = new int[10];
d) int *arr = new int*[10];
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- What is the correct syntax of declaring array of pointers of integers of size 10 in C++? a) int arr = new int[10]; b) int **arr = new int*[10]; c) int *arr = new int[10]; d) int *arr = new int*[10];C++ Double Pointer: Can you draw picture of what this means : Food **table? struct Food { int expiration_date; string brand; } Food **table; What is this double pointer saying? I know its a 2D matrix but I don't understand what I'm dealing with here. Does the statement mean that we have an array of pointers of type Food and what is the other * mean? I'm confused.5. Write a C++ function which accepts an int array and the array size as arguments. The function should dynamically create a new array which is the same size as the array passed in. Each element in the new array should be double the corresponding element in the array passed in. Return a pointer to the new array. E.g. if you pass in the array {2, -3, 5} of size 3, it should create a new array of size 3 with values {4, -6, 10} and return a pointer to it. int *doubler(int a[], int size) 6. Consider the following line of code: int temps[3] = {68, 72, 62}; - What does *temps contain? - What does *(temps+1) contain? - What does temps[1] contain? 7. The _____ function returns true if the character is an upper case letter of the alphabet: a) toupper() b) isupper() c) isalpha() d) isdigit() e) none of these 8. The _____ function converts a C-string to an int: a) strlen() b) length() c) len() d) atoi() e) none of these
- Look at the following C++ code and comment each line about how it works with pointer. int i = 33; double d = 12.88; int * iPtr = &i; double * dPtr = &d; // iPtr = &d; // dPtr = &i; // iPtr = i; // int j = 99; iPtr = &j; //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++1. Write a C++ function named "extractDebugOption" that accepts arguments similar to argc (an integer for the array size) and argv (an array of pointers to C-string). It will determine whether it has the argument of "/debug yes" or "/debug no". It will return true if the debug option is yes. If "/debug no" or there is no debug option or "/debug" without "yes" or "no" followed, it will return false. Note: command line arguments are simply an array of pointers to C-string. Please test it with the following command line arguments These will return true"/debug yes""/compile /debug yes" These will return false"/debug no""/debug""debug""yes /debug""no /debug"
- write in c++ Write ONE program that contains the following (#includes are NOT necessary). [Hint: be very careful with your pointer syntax] Write a function copies with two int parameters, named n and x. It should dynamically allocate a new array of size n. The function should then copy the value in x to every position in the array. The function should return a pointer to the new array. In the main function, call the copies function from part 1. with size 5 and value -1. Output the resulting array to the screen, and deallocate the array. In your main function, add code to declare and initialize two integer variables y and z to 10 and 3. Then call the function increment which has the prototype below. The call should result in incrementing the value in y by z (so y will become 13). void increment (int *a, int b); //do NOT define this function// this function adds b to the value pointed to by the first argumentanswer this using c++ Part 1: Write a function that receives, as arguments, a pointer to a double array, as well as the number of elements in the array (int). The function must use pointer operations (no block notation such as arr[i]) and calculate the standard deviation of the elements in the array. The function returns the standard deviation to the calling statement. Due to possible rounding or floating-point arithmetic errors, round the result to 4 decimal places. Use the formula below. Each summation can be done with a for-loop. To calculate the square root you may use the <math.h> header file. You may use the following code: float data[] = {11.2, 2.4, 3.13, 16.4, 5.8, 9.22, 4.9, 10.5, 6.5, 2.99}; int N = sizeof(data) / sizeof(float); Part 2: Write a function that receives, as arguments, a pointer to a double array, as well as the number of elements in the array (int). The function must use pointer operations (no block notation such as arr[i]) and must display each…In C programming: Write a main() function using the following requirements:• Define a SIZE constant (the value is irrelevant, but for testing, you may want to keep it small enough – no bigger than 5)• Create an array of course pointers using SIZE• Dynamically allocate each element of the array• Call inputAllCourses()• Call printAllCourses().
- In C++, When an array is passed to a function as a pointer, the function doesn't know the size of the array. List 3 ways to handle this problem.c++ Modify the following so that it uses smart pointers instead of raw pointers. // This program illustrates the use of constructors// and destructors in the allocation and deallocation of memory.#include <iostream>#include <string>using namespace std; class Squares{private:int length; // How long is the sequenceint *sq; // Dynamically allocated arraypublic:// Constructor allocates storage for sequence// of squares and creates the sequenceSquares(int len){length = len;sq = new int[length];for (int k = 0; k < length; k++){sq[k] = (k+1)*(k+1);}// Tracecout << "Construct an object of size " << length << endl;}// Print the sequencevoid print(){for (int k = 0; k < length; k++)cout << sq[k] << " ";cout << endl;}// Destructor deallocates storage~Squares(){delete [ ] sq;// Tracecout << "Destroy object of size " << length << endl;}}; //***********************************************// Outputs the sequence of squares in a…on c++ Question 01: Write a recursive function that converts a decimal number into a binary number as a string. The function header is: string decimalToBinary(int value) Write a test program that prompts the user to enter a decimal number and displays its binary equivalent. Question 02: Write a recursive function that parses a binary number as a string into a decimal integer. The function header is: int binaryToDecimal(const string& binaryString) Write a test program that prompts the user to enter a binary string and displays its decimal equivalent.