A pointer variable can take the address of a memory location as its value. Read the given program. #include main() { int a = 20, b = 30, *p, *q, **r; p = &a; *p = 50; q=&b; *q = 70; r=&p; **r = 90; } printf("%d\n", a); // 1st printf statement printf("%d\n", b); // 2nd printf statement a = 20; b = 80; printf("%d\n", **r); // 3rd printf statement Answer the following three questions. 1.The output of the 1st printf statement is [Select] 2. The output of the 2nd printf statement is [Select] 3.The output of the 3rd printf statement is [Select] >

A pointer variable can take the address of a memory location as its value. Read the given program. #include main() { int a = 20, b = 30, p, q, **r; p = &a; p = 50; q=&b; q = 70; r=&p; r = 90; } printf("%d\n", a); // 1st printf statement printf("%d\n", b); // 2nd printf statement a = 20; b = 80; printf("%d\n", r); // 3rd printf statement Answer the following three questions. 1.The output of the 1st printf statement is [Select] 2. The output of the 2nd printf statement is [Select] 3.The output of the 3rd printf statement is [Select] >

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Q: // main module Function main() // Local variables Declare numbers[] // declare array &…

A: This is number analysis program. The program asks the user to enter a series of 10 numbers. The…

Q: Pointers Consider the following program: int a - 3; int main(void) int *b = &a; a- 4; int a = 6; int…

A: Integer is in variable d just before main returns

Q: 16. NULL can be assigned to a void pointer. True O False

A: The pointer is a variable that stores a memory address.

Q: ws of pointers.

A: Pointer design issues The plan issues for pointer types are what the compass and continuation of a…

Q: Explain the general syntax to declare a pointer variable.

A: A pointer is a variable which is used to store the memory address of another variable. General…

Q: hink about how ASLR makes life harder for the bad guy

A: The question asks you to conduct an experiment to observe the impact of Address Space Layout…

Q: Generate a -NFA describing the same language as the regular expression ((11+00)(101)∗ (01∗+…

A: Transition diagram is a special kind of flowchart for language analysis. In transition diagram the…

Q: Programming in C.

A: Note: The below program has been complied and executed in "repl.it" online complier

Q: Match the following memory/pointer concepts and code structures: Leading asterisk, like *p pointer…

A: 1. *P - The *p shows the value stored in a pointer. 2. int* - int* does not represent the…

Q: Why not develop general-purpose programs in assembly language? Is assembly language ever…

A: Assembly language is not commonly used for general-purpose programs because it is…

Q: ++ programming language: Assume intptr is a pointer to an int. Write a statement that will…

A: We have to dynamically allocate memory to an a integers and store the address in intptr and thenhave…

Q: Run the following program and answer the questions. #include int main() { int a[5] =…

A: In this problem, uestion asks what will be the output of the program .

Q: 16. NULL can be assigned to a void pointer. True O False

A: ANswer is False NULL is a value. A void pointer is an untyped pointer.

Q: Using C++ Programming language: Given the following definitions: int num1=1, num2=2; int…

A: A pointer is variable which holds address of variable.

Q: In this lab, you use what you have learned about searching an array to find an exact match to…

A: #include <iostream>#include <string>using namespace std; int main() { string…

Q: Address of Array //Write the output of each cout statement. //Assume the size of ints to be 4 bytes.…

A: #include <iostream>using namespace std;int main() {int a[3][3]={{1,2,3},{4,5,6},{7,8,9}};cout…

Q: 16. NULL can be assigned to a void pointer. True O False

A: When there is a pointer that doesn't point to anything is known as the null pointer. Void pointer is…

Q: If integer pointer aPtr is to point at a data item whose value may not change it must be declared as…

A: (option C: int *const aPtr) is correct.

Q: What is the difference between a reference and a pointer?

A: Question. What is the difference between a reference and a pointer? Answer. The differences between…

Q: 16. NULL can be assigned to a void pointer. True O False

A: Given statement: NULL can be assigned to a void pointer. Requirement: Choose whether the statement…

Q: Using C++ Programming language: Assume the following definition in the main() function: const int…

A: Answer to the above question is in step2.

Q: Passed to a function as argum 3 Changed within the funcction

A: A pointer variable can not be

Question

100%

A pointer variable can take the address of a memory location as its value. Read the given program.
#include <stdio.h>
main() {
int a = 20, b = 30, *p, "q, **r;
p = &a;
*p = 50;
}
q=&b;
*q = 70;
r=&p;
**r = 90;
printf("%d\n", a); // 1st printf statement
printf("%d\n", b); // 2nd printf statement
a = 20;
b = 80;
printf("%d\n", **r); // 3rd printf statement
Answer the following three questions.
1.The output of the 1st printf statement is [Select]
2. The output of the 2nd printf statement is [Select]
3.The output of the 3rd printf statement is [Select]

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

1. Pointer Tasks This part of the assignment will give you a chance to perform some simple tasks with pointers. The instructions below are a sequence of tasks that are only loosely related to each other. Start the assignment by creating a file named pointerTasks.cpp with an empty main function, then add statements in main() to accomplish each of the tasks listed below. Some of the tasks will only require a single C++ statement, others will require more than one. For each step, include a comment in your program indicating which step you are completing in the following statement(s). The easiest way to do this is copy and paste the below into your main function first, and then fill in your statements. // 1. Create two integer variables named x and y// 2. Create an int pointer named p1// 3. Store the address of x in p1// 4. Use p1 to set the value of x to 99// 5. Using cout and x, display the value of x// 6. Using cout and the pointer p1, display the value of x// 7. Store the address…
C++ Language Write two statements that each use malloc to allocate an int location for each pointer. Sample output for given program:numPtr1 = 44, numPtr2 = 99 #include <stdio.h>#include <stdlib.h> int main(void) { int* numPtr1 = NULL; int* numPtr2 = NULL; /* Your solution goes here */ scanf("%d", numPtr1); scanf("%d", numPtr2); printf("numPtr1 = %d, numPtr2 = %d\n", *numPtr1, *numPtr2); free(numPtr1); free(numPtr2); return 0;}
// MichiganCities.cpp - This program prints a message for invalid cities in Michigan. // Input: Interactive // Output: Error message or nothing #include <iostream> #include <string> using namespace std; int main() { // Declare variables string inCity; // name of city to look up in array const int NUM_CITIES = 10; // Initialized array of cities string citiesInMichigan[] = {"Acme", "Albion", "Detroit", "Watervliet", "Coloma", "Saginaw", "Richland", "Glenn", "Midland", "Brooklyn"}; bool foundIt = false; // Flag variable int x; // Loop control variable // Get user input cout << "Enter name of city: "; cin >> inCity; // Write your loop here // Write your test statement here to see if there is // a match. Set the flag to true if city is found. // Test to see if city was not found to determine if // "Not a city in Michigan" message should be printed.…
Task - Using pointers to process arrays (C Language) Example #5 below expected output is 45, but from the program below its coming out to 46. Please help make it come out to 45 as expected In a TV show, each minute can be either interesting or boring. Assume that if 7 consecutive minutes are boring, then an average viewer will stop watching the show. Write a C program that calculates how many minutes that an average viewer will watch a TV show, given the interesting minutes. Assume the TV shows are 45 minutes long. Requirements Name your program project4_minutes.c. Follow the format of the examples below. The program will read in the number of interesting minutes, then read in the interesting minutes. The program should include the following function. Do not modify the function prototype. int find_minute(int *minutes, int n); minutes represents the input array for interesting minutes, n is the length of the array (the number of interesting minutes). The function returns the how…
If the input is negative, make numltemsPointer be null. Otherwise, make numltems Pointer point to numltems and multiply the value to which numltems Pointer points by 10. Ex: If the user enters 99, the output should be: Items: 990 406554.2871636.qx3zqy7 1 #include 2 using namespace std; 3 4 int main() { 5 6 7 8 9 10 11 12 13 14 15 16 17 int numItems Pointer; int numItems; cin >> numItems; /* Your solution goes here */ if (numItems Pointer == nullptr) { cout << "Items is negative" << endl; } else { cout << "Items: << *numItemsPointer << endl; } || 1 test passed All tests passed
Declare an integer pointer variable intPointer. Initialize it to point to an int variablenamed 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,
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; //
Instructions: You are strictly not allowed to use anything other than pointers and dynamic memory. One function should perform one functionality only. Task 1 Write a program in C++ that reads data from a file. Create dynamic memory according to the data. Now your task is to perform the following task. Row wise Sum Column wise Sum Diagonal wise Sum Example data.txt 4 5 1.6 10.2 33.7 99 20.5 3 44 50 96.1 2 8 9 4 74 50 99 19.1 Output: Sum row wise: 165, 191, 17, 242.1 Sum col wise: 127.6, 120.1, 228.8, 118.1, 20.5 Sum diagonal wise: Not Possible Note: You are restricted to use pointers and your function should be generic. Avoid memory wastage, memory leakage, dangling pointer. Use regrow or shrink concepts if required.
In C, in order to do operations to the data being referenced by a pointer you would need to use the (*) operator, which is called ______________ operator.
Submerging is the phenomenon wherein the pointer vanishes when you move it too quickly.
In the code segment Double radius = 4.5; Const double* ptr = & radius;The ptr is constant, but the data pointed to by the pointer ptr is not constant options: True False
In order to declare a pointer, the ""&"" (ampersand) symbol is used." True False