Chapter 4, Problem 1PSCS

Program Plan Intro

Program Plan:

To input the user's name and the Social Security Number and print the details in different formats.

Explanation of Solution

Program:

#include <iostream>
usingnamespace std;
intmain()
{
stringfname, lname; // string declared for the first name and the last name
intssn; // integer declared for the Social Security Number
cout<<"Enter your first name:\n";
cin>>fname;
cout<<"Enter your last name:\n";
cin>>lname;
cout<<"Enter your Social Security Number:\n";
cin>>ssn;
cout<<"Your details are:\n";
// details will be printed in different formats.
cout<<ssn<<", "<<fname<<", "<<lname<<endl;
cout<<ssn<<", "<<lname<<", "<<fname<<endl;
cout<<lname<<", "<<fname<<", "<<ssn<<endl;
return 0;
}

Explanation:

An 'iostream' is a header file or a pre-defined file in which cin and cout is defined.

To use the header files in the program, keyword include is written before the header file name surrounded with angular brackets.

The include keyword is always written after the '#', which is known as a preprocessor.

A preprocessor means something is being processed before the program. A preprocessor shows that the header files are processed before the program.

A 'using' is a keyword used to specify namespace or file is used with the program.

A ' namespace' is typically a container for a collection of identifiers. A namespace provides a degree of context for different identifiers, making it possible to differentiate identifiers with the same name.

C++ transferred all the standard library's features to a namespace called "std" (standard).

The cout is the keyword used to print a message or a value to the user or on the screen.

The cin keyword takes input from the user.

A main is the default name given to the main function of a program where the return type means function should return some value, here return type int is given.

In a program, the return type of the main function is int, that is, it should return an integer value. The return is considered as the exit status of an application.

Sample Output: