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1: This
#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:
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- This lab will exercise your understanding of some of the concepts covered in Chapter 14: pointers and linked lists 1. Declare an integer pointer variable intPointer. Initialize it to point to an int variable named someInt. Assign the value 451 to someInt and output (cout) the variable someInt and output (cout) the value pointed to by intPointer. Write an assignment statement that indirectly stores 900 into the value pointed to by intPointer. Output (cout) the value pointed to by intPointer and output (cout) the variable someInt, 2. Declare a pointer variable charArrPointer and initialize it to point to the first element of a three-element char array named initials. Write assignment statements to store 'A', 'E', and 'W' into the first three elements of the array POINTED to by charArrPointer. Do NOT store any values directly into the array named initials. 3. Output (cout) the data in array charArrPointer and the data in array initials. 4. Copy the following code into your program above…It's well knowledge that "dangling and wild pointers" are problematic for pointers. Use specific examples to back up your argument.C Programming-Plz fix this code We can return multiple values from functions using pointers. Let's see an example. # include <stdio.h> void add Gr.marks (int * m) { *m = * m + 10; } void main ( ) { int marks; clrscr ( ); printf("enter actual marks:"); scanf(" % d", & marks); add Gr.marks (& marks); printf(" \n the graced marks is :\t % d", marks); }
- (a) Determine whether the following variable declaration is valid int INT; A Valid B Invalid (b) Determine whether the following variable declaration is valid. int *ptr; A Valid B Invalid (c) Which of the following statement about pointer is TRUE? A. A pointer variable is a variable used tostore an address B.A pointer holds the data, rather thanwhere to find the data C.The unary operator & is used to find anobject's value D.The unary operator * is used to find an object's addresswrite 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 argumentThe following code C++ uses pointers and produces two lines of output. What is the output? int v1 = 10; int v2 = 25; int* p1 = &v1; int* p2 = &v2; *p1 += *p2; p2 = p1; *p2 = *p1 + *p2; cout << v1 << " " << v2 << endl; cout << *p1 << " " << *p2 << endl; find line 1 and 2.
- C++ Pointers must be used to solve the following problem. Write a function createPassword() with no return value to randomly select 8 capital letters from the alphabet. The function receives the address of the first characters of the password string as parameter. Hint: Declare a characters string that contains all the capital letters of the alphabet and use the index values of the characters in the string for random selection of characters, e.g.char alpha [27] = “ABCDEFGHIJKLMNOPQRSTUVWXYZ”;char *pAlpha = alpha; Display the password from the main() function. Write a function replaceVowels() with no return value to replace all the vowels (A, E, I, O, U) that have been selected with a symbol from the list ($ % @ # &). That is, A must be replaced by $, E replaced by %, I mustbe replaced by @, O replaced by #, and U must be replaced by &. The function receives the address of the first characters of the password string as parameter. Display the password agin from the main()…Define the term " pointer to void " .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 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.Creat a code in c++ using s class compute array By using pointer notation, write a program that have three local arrays of same size and float type in the main () function. And consider that the values of first two are already initialized. To takethe addresses of all the arrays as arguments, write the function named ComputeArrays () that adds the contents of the first two arrays and before returning that store the results in the third array. The fourth argument to this function can store the size of the arrays.What is a variable pointer? What follows? It is a variable array. Why are pointers and dynamic arrays problematic?