How do I write this C code?

Given a sequence {a,}, , an n-moving average is a new sequence defined by taking the anthmetic mean of subsequences of n terms: As an example, consider the following table: Day Temperature S-Day Moving Value of i Values Used in Computing MA Ce Av Average of Days I t Average of Days 3 through 7 Average of Days 4 through 8 of of 10 Av 10 The user will supply data to the program using the numerical keys on the keyboard. The program should check if the provided input is a positive integer, if so, it will consider it as the next data item in the sequence and update the moving average. The program terminates when the user enters a negative integer number The length of the subsequence is fixed and it is equal to 5 (i.e., n- 5). The following is a detailed sample run of the program: nter nunber, 21 e Run nter a number: 22 nter a number: 20 nter a number: 18 nter a number: 19 > Moving Auerage 20.000e0 nter a number:- rocess exited after 50.03 seconds with return ualue ress any key to continue