Computer Programming Lab 2

Computer Programming Lab 2:

Lab 02: Variables and Data Types

Exercises

Task 1:

Write a program that takes 3 values from user. Two values of integer and one value of float data type. Print each result on one line.

Source Code

#include <iostream>

using namespace std;

int main()

{

     int a, b;

            float c;

            cout<<"a= ";

            cin>>a;

           

            cout<<"b= ";

            cin>>b;

           

            cout<<"c= ";

            cin>>c;

           

            cout<<"Integer a="  <<a  <<" integer b=" <<b <<" float=" <<c;

   return 0;

}

Task 2:

Write a program that gets 2 integers input from user and store them in variables. Do the five basic Arithmetic Operations (+  , - , *, /, %) of the two numbers. Print the results of operations as below

Source Code:

#include <iostream>

 #include <cmath>

using namespace std;

int main()

{

            float a, b;

            string sum, multiply, divide, subtraction, percentage;

            cout<<"entering two integers"<<endl;

            cin>>a;

            cin>>b;

           

            sum= a+b;

            multiply= a*b;

            divide= a/b;

            subtraction= a-b;

            percentage= (a/100)*b;

           

            cout<<"sum=" <<a+b << "\n" <<"multiply=" <<a*b << "\n" <<"divide=" <<a/b << "\n" <<"subtraction=" <<a-b << "\n" <<"percentage=" <<(a/100)*b;

           

            return 0;

}

Snapshot:

Task 3:

Write a program that prompt user to input course name, obtained marks and total marks. Calculate the percentage using this formula

Marks percentage = marks obtained / total * 100

And display the results as follows.

Source Code:

#include <iostream>

using namespace std;

int main()

{

            float  marks_obtained, total_marks, marks_percentage;

            string course_name;

            cout<<"course_name"<<endl;

            cin>>course_name;

           

            cout<<"marks_obtained"<<endl;

            cin>>marks_obtained;

            cout<<"total_marks"<<endl;

            cin>>total_marks;

           

            marks_percentage = (marks_obtained/total_marks)*100;

           

            cout<<"In " <<course_name <<" course. You have secured " <<marks_percentage <<"%";

           

             return 0;

           

}

Snapshot:

Task 4:

Write a program that finds the value of X by using given formula. Take value of a and b from user.

X= (a + b)2 – 2ab

Source Code:

#include <iostream>

using namespace std;

int main()

{

            int a, b, X;

 

            cout<<"a =";

            cin>>a;

           

            cout<<"b =";

            cin>>b;

           

   X= (a+b)*2-2*(a*b);

           

            cout<<"X=" << (a+b)*2-2*(a*b);

            return 0;

           

}

Snapshot:

Task 5:

Write a program that plays a word game with the user. The program should ask the user to enter the following:

User’s name

Year of birth (eg. 1990)

Name of university

A favorite hobby

A pet’s name

Write a program that will produce an outcome as below:

Source Code:

#include <iostream>

using namespace std;

int main()

{

            string user_name,  name_of_university,  A_favorite_hobby, pet_name;

            int year_of_birth,birth_year;

           

            cout<<"What is your name?"<<endl;

            cin>>user_name;

           

    cout<<"Year of birth"<<endl;

    cin>>year_of_birth;

   

    birth_year= 2017-year_of_birth;

   

    cout<<"Name of University"<<endl;

    cin>>name_of_university;

   

   

    cout<<"A favorite hobby"<<endl;

    cin>>A_favorite_hobby;

   

    cout<<"pet name"<<endl;

    cin>>pet_name;

   

    cout<<"there's lives a person named " <<user_name <<" whose is currently age of " << birth_year<<". " << user_name <<" is studying at " <<name_of_university <<". it is interesting because " <<user_name <<" likes to read with " <<pet_name <<" and they lived happily after!";

   

    return 0;

}

SnapShot:

Task 6: (Assigment)

Write a program that inputs a five-digit integer, separates the integer into its

Individual digits and prints the digits vertically. For example, if the user types

32156, the program should print:

6

5

1

2

3

Source Program:

using namespace std;

int main()

{

            int a,x,x1,x2,x3,x4;

           

            cout<<"input a five digit integer:";

            cin>>a;

           

                       

            x= a%10;

            a=a/10;

            x1=a%10;

            a=a/10;

            x2=a%10;

            a=a/10;

            x3=a%10;

            a=a/10;

            x4=a%10;

   cout<<x <<endl <<x1 <<endl <<x2 <<endl <<x3 <<endl <<x4;   

           

            return 0;

}

Snapshot:

Task 7:

Hypotenuse refers to the side opposite the right angle in a right-angled triangle (as shown in the diagram below).

Hypotenuse can be calculated using the following formula:

Area of this right-angled triangle can also be calculated using the following formula:

a = ½ * x * y

 

Write a C++ program that prompt user to enter value of X and Y. You have to calculate the value of Hypotenuse (h) and Area (a).

Source Code:

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

  float a, h, x, y;

 

  cout<<"x=";

  cin>>x;

 

  cout<<"y=";

  cin>>y;

 

  h=sqrt(x*x+y*y);

 

 

  a=0.5*x*y;

 

  cout<<"Hypotenuse= " <<h <<"\n" <<"Area= " <<a ;

 

  return 0;

}