1- If the following lines of code have errors, correct them; otherwise, write "no errors." double 2_A = 2.5; string B_2 = 2_A; cout << B_2 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).

1- If the following lines of code have errors, correct them; otherwise, write "no errors." double 2_A = 2.5; string B_2 = 2_A; cout << B_2 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).

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

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Concept explainers

Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.

Question

39
1- If the following lines of code have errors, correct them; otherwise, write "no errors."
double 2_A = 2.5;
string B_2 = 2_A;
cout <<B_2
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++

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