/***************************************************
 * Author    : CS Developers
 * Author URI: https://www.comscidev.com
 * Facebook  : https://www.facebook.com/CSDevelopers
 ***************************************************/
 
#include <stdio.h>

int main()
{
	int course_amount = 5;
	float score;
	float grade_total = 0;
	float gpa;
	int i;
	
	for(i = 0; i < course_amount; i++)
	{
		printf(" Enter score of course #%d : ", i+1);
		scanf("%f", &score);
		
		if(score >= 80){
        	grade_total += 4;
	    }
	    else if(score >= 75){
	        grade_total += 3.5;
	    }
	    else if(score >= 70){
	        grade_total += 3;
	    }
	    else if(score >= 65){
	        grade_total += 2.5;
	    }
	    else if(score >= 60){
	        grade_total += 2;
	    }
	    else if(score >= 55){
	        grade_total += 1.5;
	    }
	    else if(score >= 50){
	        grade_total += 1;
	    }
	    else{
	        grade_total += 0;
	    }
	}
	
	gpa = grade_total / course_amount;
	
	printf("\n GPA of %d courses = %.2f", course_amount, gpa);
	
	return 0;
}