Computer Programming Lab 4

          Lab 03: Decision Statements

Exercise 1:

Write a C++ Program that read a float (amount) and an int (num) input from user. Add both (amount and num) numbers and store them in two different int (a) and float (b) variables. Display the outputs of a and b variables. Also if outputs are greater than 16 print “value of a & b > 16” else print “value of a & b < 16”.

Source Code:

#include <iostream>

using namespace std;

int main()

{

            float amount,b;

            int num,a;

           

            cout<<"amount= ";

            cin>>amount;

            cout<<"num= ";

            cin>>num;

           

            a= amount+num;

            b= amount+num;

            cout<<"the value of a= "<<a<<endl;

            cout<< "the value of b= "<<b<<endl;

            if(a>16 && b>16)

{

            cout<<"value of a & b > 16"<<endl;

           

}          

    else

{

            cout<<"value of a & b < 16"<<endl;

}

  return 0;

}

    Result:

Exercise 2:

Write a C++ Program that read three input from user and returns the smallest one.

Source Code:

#include <iostream>

using namespace std;

int main()

{

            double a,b,c;

            cout<<"A= ";

            cin>>a;

            cout<<"B= ";

            cin>>b;

            cout<<"C= ";

            cin>>c;

           

            if (a<b && a<c)

            {

                        cout<<"The smallest no is "<<a<<endl;

           

            }

  else if  (b<c && b<a)

  {

            cout<<"the smallest no is "<<b<<endl;

  }

  else

  {

            cout<<"the smallest no is"<<c<<endl;

  }

  return 0;

}

Result:

Exercise 3:

Write a C++ Program that read an alphabet (e.g. a, b, c, d...z) and display whether the input alphabet is a vowel (i.e. a, e, i, o, u) or consonant.
Source Code:
#include <iostream>
using namespace std;
int main()
{
            char X;
           
 cout<<"X= ";
 cin>>X;

 if(X=='a')
 {
  cout<<"the input alphabet is a vowel ";
 }
 else if (X=='e')
 {
            cout<<"the input alphabet is a vowel";
 }
  else if(X=='i')
 {
 cout<<"the input alphabet is a vowel";
 }
  else if (X=='o')
 {
            cout<<"the input alphabet is a vowel";
 }
  else if (X=='u')
 {
            cout<<"the input alphabet is a vowel";
 }
 else
 {
 cout<<"the input alphabet is not a vowel";
 }
 return 0;
}
Result:

Exercise 4:

Write a C++ Program that read a number from user .Test the user entered number whether it is EVEN or ODD. Print the message that number is EVEN or ODD.

Source Code:
#include <iostream>
using namespace std;
int main()
{
            int x;
           
            cout<<"integer: ";
            cin>>x;
if (x%2==0)
{
            cout<<"the number is even";
}
else
{
            cout<<"the number is odd";
}
 return 0;
}

Result:

Exercise 5:

Write a C++ Program that read an integer input in between (1 to 12) and store it month_of_year. Print the corresponding month of year. Use else if statement.
Example: Input is 4… Print “April”
Source Code:
#include <iostream>

using namespace std;
int main()
{
            int month;
            cout<<"month= ";
            cin>>month;
            if (month==1)
{
            cout<<"January";
}          
else if(month==2)
{
            cout<<"February";
}
else if(month==3)
{
            cout<<"March";
}
else if(month==4)
{
            cout<<"April";
}          
else if(month==5)
{
            cout<<"May";
}
else if(month==6)
{
            cout<<"June";
}
else if(month==7)
{
            cout<<"july";
}
else if(month==8)
{
            cout<<"August";
}
else if(month==9)
{
            cout<<"September";
}
else if(month==10)
{
            cout<<"October";
}
else if(month==11)
{
            cout<<"November";
}
else if(month==12)
{
            cout<<"December";
}
else
{
            cout<<"Your are out of world";
}
return 0;
}

Result:

Exercise 6:

Rewrite exercise 5 using switch statement.
Source Code:
#include <iostream>

using namespace std;
int main()
{
            int x;
            cout<<"enter Month: ";
            cin>>x;
            switch(x)
{
            case 1:
            cout<<"january";
   break;
   case 2:
            cout<<"february";
            break;
            case 3:
            cout<<"March";
            break;
   case 4:
   cout<<"April";
   break;
   case 5:
   cout<<"May";
            break;
            case 6:
            cout<<"June";
            break;
            case 7:
            cout<<"July";
            break;
            case 8:
            cout<<"August";
            break;
            case 9:
            cout<<"September";
            break;
            case 10:
            cout<<"October";
            break;
            case 11:
            cout<<"Novcember";
            break;
            case 12:
            cout<<"Decmber";
            break;
            default:
                        cout<<"You are Out of This World";
  
}
                        return 0;
}

Result:

Exercise 7:

Write a C++ Menu driven program that allows a user to enter 3 numbers and then choose between findings the smallest, largest, sum or average. Use else if statement to determine what action to take.
Source Code:
#include <iostream>
using namespace std;
int main()
{
            double x,y,z,Sum;
 cout<<"x= ";
 cin>>x;
 cout<<"y= ";
 cin>>y;
 cout<<"z= ";
 cin>>z;
 Sum=x+y+z;

 cout<<"Sum= "<<Sum<<endl;
 if (x<y && x<z)
 {

 cout<<"the smallest number is "<<x<<endl;
}
 else if (y<x && y<z)
{

            cout<<"the smallest number is "<<y<<endl;
}

 else
 {

            cout<<"the smallest number is "<<z<<endl;
 }
 if (x>y && x>z)
 {
            cout<<" the largest number is "<<x<<endl;
 }
 else if (y>z && y>x)
 {
            cout<<"the largest number is " <<y<<endl;
 }
 else
 {
            cout<<"the largest number is "<<z<<endl;
 }


 return 0;
}

Exercise 8:

Rewrite exercise 7 using switch statement.
Source Code:

#include<iostream>

using namespace std;

int main()

{   

                float a,b,c;

                int option;    

                cout<<"Enter any three values:"<<endl;

                cin>>a>>b>>c;

                cout<<"'a' for Smallest: "<<endl;

               cout<<"'b' for Largest:"<<endl;

                cout<<"'c' for Sum:"<<endl;

                cout<<"'d' for Average:"<<endl;

                cout<<"Enter one of the above choices: ";

                cin>>option;

                switch(option)

                {

           

                case 1:

               if(a<b && a<c)

                {

                cout<<"The smallest num is: "<<a<<endl;

            }

    else if(b<a && b<c)

    { 

cout<<"The smallest num is: "<<b<<endl;

  }

   else

  cout<<"The smallest num is: "<<c<<endl;

  break;

     case 2:

        if(a>b && a>c)

   {          

  cout<<"The largest num is: "<<a<<endl;

  }

    else if(b>a && b>c)

    {

          cout<<"The largest num is: "<<b<<endl;

       }

    else

  cout<<"The largest num is: "<<c<<endl;

    break;

           

  case 3:

    cout<<"Sum of Values are:"<< a+b+c<<endl;   

   break;

    case 4:

     cout<<"Avearage of Values are: "<<(a+b+c)/3<< endl;

    break;

                }

                return 0;

    }