//if example

#include<stdio.h>

int main(void)
{
	
	const int FAIL = 50; //50% is a fail
	int grade;			 
	int fails = 0;		 
	int total = 0;
	
	printf("Please enter your percentages.\n");
	printf("Enter q to quit.\n");
	while(scanf("%d", &grade)==1) 
	{
		total++;
		if(grade < FAIL)
			fails++; //increment fail count if grade is less than 50
	}

	if(total !=0)
		printf("%d grades in total: %.1f%% were fails.\n",
			total , 100.0 * (float) fails / total);
	if(total == 0)
		printf("You didnt enter any grades.\n");

	return 0;
}