Skip to main content

C++ home work

By
Q1. How do you differentiate variables and identifiers?
Answer: A variable is a data name that may be used to store a data value. Unlike constants that remain unchanged during the execution of a program, a variable may take different values at different times during execution.
Identifiers refer to the names of variables, functions, arrays, classes, etc., created by the programmer. The first character in an identifier must be a letter or the _ (underscore) character; however, beginning identifiers with an underscore is considered poor programming style.

Q2. Does C++ provide any ternary operator? If yes, explain its works.
Answer: A ternary operator pair “? :” is available in C++ to construct conditional expressions of the form exp1 ? exp2 : exp3;
Where,
 exp1, exp2, andexp3are expressions.
The operator ? : works as follows: exp1 is evaluated first. If it is nonzero (true), then the expression exp2 is evaluated and becomes the value of the expression. If exp1 is false, exp3 is evaluated and its value becomes the value of the expression. Note that only one of the expressions is evaluated. For example, consider the following statements:
a = 10
b = 15
x = (a > b) ? a : b;

In this example, x will be assigned the value of b. This can be achieved using the if.. else statements as follows:


Labels:

Comments

Post a Comment

Popular posts from this blog

Database Management System(DBMS)

By
Data and Information  Data is an unprocessed raw fact which does  not give complete meaning about any object,person, entity etc. But when various inter-related data arranged in a row, it gives a complete meaning which is referred to as information. For Example: ID Name Address Program 1101 Ram Shrestha Biratnagar BScIT         is information of a specific person. Database Database is a repository(storage) for the organized collection of related information  of data items. It Consist of meaningful arrangement of data, relationship, constraints, schema etc. In modern days we define database as a computerized record-keeping system used to store information and allows users to retrieve and update these information on their request. Some example of databases are telephone directory, data of SLC result, student and employee records etc. Database Management System(DBMS) Database is the softw...
Post a Comment
Read more

What is Java Applets?

By
An applet is a special kind of Java program that is designed to be transmitted over the Internet and automatically executed by a Java-compatible web browser. Furthermore, an applet is downloaded on demand, without further interaction with the user. If the user clicks a link that contains an applet, the applet will be automatically downloaded and run in the browser. Applets are intended to be small programs. They are typically used to display data provided by the server, handle user input, or provide simple functions, such as a loan calculator, that execute locally, rather than on the server. In essence, the applet allows some functionality to be moved from the server to the client.
Post a Comment
Read more

What is manipulator in C++?

By
Answer: Manipulators are special functions that can be included in the I/O statement to alter the format parameters of a stream. Table-2 shows some important manipulator functions that are frequently used. To access these manipulators, the file < iomanip.h > should be included in program.                               Table-2               Manipulators                                                    Equivalent ios function               set...
Post a Comment
Read more