#include<stdio.h>
int main(){
	/* 

	int num1 = 1, num2 = 3, num3 = 4;
	double average = (num1 + num2 + num3) / 3;
	(1+3+4)=8 int, 8/3=int/int truncated int = 2
	when you assign 2 to the double type variable average=2.000000
	printf("average is %f\n", average);
	 
	int num1 = 1, num2 = 3, num3 = 4;
	double average = (num1 + num2 + num3) / 3.0;
	8/3.0=int/double=2.666667
	printf("average is %f\n", average); 
	

	double num1 = 1.0, num2 = 3.0, num3 = 4.0;
	double result = (2/5) * (num1 + num2 + num3);
	2/5=0   0*(1.0+3.0+4.0) = 0.000000
	printf("result is %f\n", result);
	
	int num1 = 1, num2 = 3, num3 = 4;
	double result = (2/5.0)*(num1 + num2 + num3);
	2/5.0=int/double=0.4   0.4*(1+2+4)=0.4*8=3.2
	printing 3 decimal digits 3.200
	printf("result is %.3f\n", result); 
	*/
	return 0;
}