NPTEL - WEEK 3 ASSIGNMENT 3 QUESTION 02

 QUESTION :

In this question, you have to output the "moving average" of a

sequence of non-negative numbers. The moving average is the sequence

of averages of the last 2 entries. For the first number, no average

is output.

For example, if the sequence of numbers is

a1, a2, a3, a4, a5

then the 2-moving average is

(a1+a2)/2, (a2+a3)/2, (a3+a4)/2, (a4+a5)/2 

Input

-----

The input is a sequence of non-negative floating point numbers,

terminated by a -1. The -1 is not part of the sequence. There will be

at least 3 numbers in the sequence.

Output

--------------------------------------------------------------------------------------------

You have to output the moving average of the sequence. The output

should be printed correct to one digit after the decimal. 

Sample Input 1

-------------------------------------

1 2 3 -1

Sample Output 1

-------------------------

 1.5 2.5

SOLUTION :

#include<stdio.h>

int main()
{
    float prev = 0, curr = 0, avg = 0;
   
    scanf("%f", &prev);
   
    while(curr != -1)
    {
        scanf("%f", &curr);
        if(curr == -1)
        {
            break;
        }
        avg = (prev + curr)/2;
        printf("%.1f ", avg);
        prev = curr;
    }
    return 0;
}