grading_snippet.c

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

int main()
{
	bool condition = false;
	double *scores = NULL;
	double score = 0.0;
	double sum = 0.0;
	int counter = 0;
	int i = 0;

	printf("%s", "How many scores you want to enter?\n");
	scanf_s("%d", &counter, sizeof(int));

	scores = malloc(sizeof(double) * counter);

	if (!scores)
		return false; // Memory error

	counter = (counter < 0) ? -counter : counter; //To avoid PEBKAC issues
	
	/* Part 2 of "Abstraction" */
	do {
		condition = true;
	/* Part 1 ("Abstraction")  "unknown" to the outside of the program, though the variables are known... */
		do
		{
			printf("%s", "Please enter a score:\n");
			scanf_s("%lf", &score, sizeof(double));

			/* Check if the number is outside its bounds */
			if (score < (double)0 || score > (double)100)
				printf("%s", "Please put a number between 0 to 100\n");
			else // Good number
				condition = false;
		} while (condition);
		
	/* End of Part 1 */
		printf("Received score %d out of %d\n", i + 1, counter);
		scores[i] = score;
		sum += score;
		i++;
	} while (i < counter);
	/* End of Part 2 */

	/* Dump scores */
	for (i = 0; i < counter; i++)
	{
		printf("%.2lf\t", scores[i]);
	}
	printf("\nAverage is %.2lf", sum / counter);

	getchar();
	getchar(); //cuz bugs
	free(scores);
	return true;
}