Average of every third integer between 1 to 100

Q : Write and explain the action of WHILE statement. Develop a program in ‘C’ language to compute the average of every third integer number lying between 1 and 100. Include appropriate documentation.

Solution : 

Read While loop

Program :

#include<stdio.h>

#include<conio.h>

void main()

{

     int a,b,c;

     clrscr();

     for(a=1,b=0,c=0;a<=100;a+=3)

     {

          c+=a;

          b++;

     }

     printf("\n\tAverage of every third integer between 1 to 100 is %d",c/b);

     getch();

}

Documentation :

• Variable a is used for count 1 to 100
• variable c is sum of every third integer . get by a because a is incremented by 3 in each loop turn.
• Variable b is used to trace how many third number are in range of 1 to 100.
• As we know formula of calculating average is sum of value divided by number of element is perform while printing

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