Page 22 - Modular_V2.0_C++_Flikpbook
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a = a + b;
b = a - b;
a = a - b;
cout<< "Values of a and b after swapping are " << a << " and " <<
b << ".";
getch();
}
The output of the above program is displayed as follows:
DOSBox 0.74, Cpu speed: max 100% cycles, Frameskip 0, program: TC
Values of a and b before swapping are 15 and 25.
Values of a and b after swapping are 25 and 15._
Program 4: To calculate the area of a circle of radius 5 cm.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int radius = 5;
DOSBox 0.74, Cpu speed: max 100% cycles,
float pi = 3.14, area = 0; Area of circle is: 78.5_
area = pi * radius * radius;
cout<<"Area of circle is: "<<area;
getch();
}
Recap
A character set refers to the letters, digits and special symbols that can be used to write
programs in C++ language.
Tokens are the smallest individual units of a C++ program.
Keywords are special words in C++ that have a fixed meaning and cannot be used as variable
names.
A data type defines the type of value a variable can store.
Primitive data types are built-in or predefined data types.
Variables are memory locations used to store values.
A constant is a fixed value which does not change during the program execution.
C++ allows some special characters in its coding called delimiters or punctuators.
Operator is a symbol that performs operations on variables and values, such as arithmetic,
comparison, or logical operations.
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Touchpad MODULAR (Ver. 2.0)

