Section Three Exercises

Write a program

1. Write a program to calculates the volume of a sphere.

   Expected Output:

    Input the radius of the sphere : 5
    The volume of sphere           : 523.598816.
   

2. Write a program to prints the perimeter of a rectangle to take its height and width as input.

   Expected Output:

    Input the height of the Rectangle : 5
    Input the width of the Rectangle  : 7
    Perimeter of the Rectangle is     : 24.00
   

3. Write a program to converts kilometers per hour to miles per hour.

   Expected Output:

    Input kms per hour : 15
    Miles per hour     : 9.320568
   

4. John bought a bicycle for Rs 350 and sold to a buyer for Rs 380. Did he make profit or loss by selling the bicycle?

   Write a program to calculate the profit or loss and also find the profit or loss percentage.

5. Number inspector program.

   Write a program to accept a number from keyboard, and check whether it is

   • even or odd
   • prime or non-prime
   • divisible by 3

   Expected Output:

   Enter the number: 15
   
   '15' is odd number.
   '15' is non-prime number.
   '15' is divisible by 3.
   

6. Write a program to accept a year as an input and determine whether it is a leap year or not.

   Use the following logic:

   Leap Year:

   • If a year is divisible by 4, 100 and 400 then it is a leap year.
   • If a year is divisible by 4 but not divisible by 100 then it is a leap year

   Not a Leap Year:

   • If a year is not divisible by 4 then it is not a leap year
   • If a year is divisible by 4 and 100 but not divisible by 400 then it is not a leap year

7. Accept the ages of foo, bar, and baz from keyboard and write a program to determine the youngest and eldest among three.

Find output of program

1. Behavior of if and Garbage value

    #include <stdio.h>
    int main() {
      int a = 300, b, c;
      if (a >= 400)
        b = 300;
        c = 200;
        printf("\n%d%d", b, c);
   
      return 0;
    }
   

2. Behavior of if

    #include <stdio.h>
    int main() {
      int a = 10, b = 20;
      if (a == b);
        printf("\n%d%d", a, b);
   
      return 0;
    }
   

   NOTE: Try removing ; in the if statement.

3. Behavior of if...else

    #include <stdio.h>
    int main() {
      int a = 10, b = 20;
      if (a == 10)
        printf("\n%d", a);
      else;
        printf("\n%d", b);
   
      return 0;
    }
   

   NOTE: Understand why 20.

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