Calculating Contra-harmonic Mean

Problem Statement
Write a C program that reads a sequence of positive  floating-point numbers from the
keyboard . It computes and finally prints the largest data in the data stream and
the contra harmonic mean of the data. The number of data is is not known a prior.
They are counted while reading. [You are not
allowed to use any array]

#include<stdio.h> int main() { float sum,sqsum ,contraharmonic, count,max,a; sum=sqsum= count=max=0.0; printf("enter the number sucessively and enter ctrl-d in the end \n"); while(scanf("%f",&a)!=EOF) { count=count+1; sum=sum+a; sqsum=sqsum+(a*a); if(a>max) { max=a; } } contraharmonic=(sqsum)/sum; printf("the largest number u entered is %f \n",max); printf("the contraharmonic mean is %f", contraharmonic); return 0; }