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DAY3

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User-definedData Types

Structure

Union

Class

Enumeration

Built-In DataTypes

Integral int, float

Void

Float, double

DeriveTyp

A

Fu

P

Re

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Data Types

Type Typical Bit Width Typical Range

signed char 1byte -127 to 127

int 4bytes-2147483648 to

2147483647

unsigned int 4bytes 0 to 4294967295

signed int 4bytes -2147483648 to2147483647

short int 2bytes -32768 to 32767

unsigned short int Range 0 to 65,535

signed short int Range -32768 to 32767

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Type Typical Bit Width Typical Range

long int 4bytes-2,147,483,647 to

2,147,483,647

signed long int 4bytes same as long int

unsigned long int 4bytes 0 to 4,294,967,29

float 4bytes +/- 3.4e +/- 38 (~

double 8bytes +/- 1.7e +/- 308 (

long double 8bytes +/- 1.7e +/- 308 (

char 1byte -127 to 127 or 0 t

unsigned char 1byte 0 to 255

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INPUT/OUTPUT (I/O)

C++ supports input/output statements which can be usto feed new data into the computer or obtain output o

output device such as: VDU, printer etc.

The following C++ stream objects can be used for the

input/output purpose. 1. cin - console input

2. cout - console output

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Output Operator

The statement [cout

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Input Operator

The statement [cin >> num1 ] is an input statement ancauses the program to wait for user input for a number

The >> operator is called Extraction operator

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Declaration of Variable

C++ allows the declaration of variable anywhere in thescope.

A variable can be declared right at the place of its first

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Program N0 5 : Addition of two number

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Dynamic Initialization of Variable

C++ permits initialization of variable at run time.

This is referred as Dynamic Initialization of variable

A variable can be initialized at run time using expressio

the place of declaration

Ex.

float area = 3.14159 * rad * rad

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Program No. 6: Calculate Area of Circ

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Program NO. 7 : Input Price, Qty and calculate biamount with discount of 5.00% if price is greaterthan 50

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Program No. 8

Input a number anddisplay factorialvalue using loopstatement

Factorial :

A factorial of a non-negative number nis the product of allpositive integersless than or equal ton