/*
Write a program that reads 7 real numbers. 
Each number indicates the Fahrenheit temperature for one day. 
The program finds and prints the average Celsius temperature for these 7 days. 
Use the following formula to convert Fahrenheit to Celsius: Celsius = (5/9)*(Fahrenheit-32) 
*/



#include<stdio.h>
int main(){
	int i=0;
	double tempF, tempC, sum=0.0,ave;
	printf("enter 7 Fahrenheit temp for 7 days\n");
	while(i<7){
		scanf("%lf",&tempF);
		tempC=((double)(5)/9)*(tempF-32);
		sum+=tempC;
		i++;
	}
	ave=sum/7;
	printf("ave Celsius %f\n",ave);
	return 0;
}