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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- In C++ Create an array of head pointers, statically allocated of size 101 of that type: Now, create a pointer that can point to the first element: Show how to dynamically allocate an array of 101 elements of head pointers: Write the code to initialize each element to NULL: Rewrite the code to initialize each element to NULL using pointer arithmetic:Write a C/C++ 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 element in the array.C++ By defining a dynamic allocation for pointer array, ask the user to enter some numbers and then return a sorted list of those numbers.
- 1: This program demonstrates the use of pointers. What is the output of this program? Assume we know that the initial address of x is 0012FF44. #include <iostream> using namespace std; int main() { int x=25; int *ptr; // pointer ptr=&x; cout<<x<<endl; cout<<*ptr<<endl; cout<<ptr<<endl; //Now we assign 100 to x *ptr=100; cout<<endl; cout<<"Now we assign 100 to x:"<<endl; cout<<x<<endl; cout<<*ptr<<endl; cout<<ptr<<endl; return 0; } Write down the output:write in c language 1. Given the following array declaration: int A [3 ][2 ]={{13, -23}, {3, 80} ,{91,55} }; declare a pointer that points to A[2][0]? Answer: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
- Write a function in C++ which (normally) allocates new space for a double array. It should alter its pointer argument to point to the newly allocated space. The size of the array should be a second argument. If this argument is not a valid array size, allocate a single double instead of an array. An example call might be: double * p; allocate(p, 25); // p now points to an array of 25 doubles -- if successfulwrite 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 argumentWrite a C program that uses a struct that represents a box, with a length, width, and height, all ints. The program needs a show_boxes function which takes a pointer to a box and int for the length of an array of boxes and uses pointer arithmetic to iterate through the array, calculating the volume of each box (length * width * height) and printing a mesage similar to this for each boxbox with length 2, width 3, height 7, and volume 42.main should use malloc() to create an array of 3 boxes, give values for the length, width, and height of each box, then call show_boxes.a. Write the header file, with the struct definition and a prototype for the show_boxes functionb. Write the .c file, with the show_boxes and main functions
- Solve the following C++ Program. you are supposed to DYNAMICALLY create 2 arrays of length 5 using pointer, Then take values from the user and put those values in ONE of the dynamic arrays and COPY those values from the first array to the second Array.In C++, how can one easily duplicate a set of shared pointers into another array? Make a list of various solutions to the situation you've been given. Is it true that copying shared pointers also copies the objects they manage? ExplainWhat is a variable pointer? What follows? It is a variable array. Why are pointers and dynamic arrays problematic?