Exercises No 1

a) const double Pi=3.14;

b) double Parameter;

c)cout<<"input data";
cin>>data;

d) int num_compt;
cout<<"input number of computer";
cin>>num_compt;

Exercises No 2

Exercises No 3

main()
{
float Allowance=300.00;
float salary;
cout<<"Input Salary=";
cin>>salary;
Tsalary=salary+ Allowance;
cout>>"Salary is=" , salary;
}

Exercises No 4

#include <iostream.h>
main()
{
double day_salary;
int days=20;
double monthly_salary;


cout<<"enter day salary";
cin>>day_salary;
cout<<"enter days working";
cin>>days;

monthly_salary=Day_salary*days;
cout<<"Your monthly salary =", monthly_salary;
}

Exercises No 5

Program that calculates the average of 5 numbers that can be input by user.

 
#include <iostream.h>
main()
{ 
int num1, num2, num3, num4, num5, average;
cout<<"enter number 1";
cin>>num1;
cout<<"enter number 2";
cin>>num2;
cout<<"enter number 3";
cin>>num3;
cout<<"enter number 4";
cin>>num4;
cout<<"enter number 5";
cin>>num5;

average=(num1+num2+num3+num4+num5)/5;
cout<<"average for five number is=" , average;

}

Exercises no 6

Program that will calculate the area of rectangular, triangle and circle.

#include <iostream.h>
main()
{
double area_rect , area_triangle, area_circle, base , height, width, radius;
const double π=3.14; 
cout<<"Calculate area of rectangular.";
cout<<"Enter height=";
cin>>height;
cout<<"Enter width";
cin>>width;
area_rect=height * width;
cout<<"area of rectangular=", area_rect;

cout<<"Calculate area of triangle.";
cout<<"Enter base=";
cin>>base;
cout<<"Enter height";
cin>>height;
area_triangle= 1/2 * base * height ;
cout<<"area of triangle=", area_triangle;

cout<<"Calculate area of circle.";
cout<<"Enter radius=";
cin>>radius;
area_circle= 3.14;
cout<<"area of circle=", area_circle;
}