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keskmineHinne/keskmineHinne.c

+/**
+ * File:		keskmineHinne.c
+ * Author:		Rainer Liis
+ * Created:		19.02.2018
+ * Last edit:	20.02.2018
+ *
+ * Description: The program scans in the students and their grades, 
+ * 				finds the best and the worst.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "struktuur.h"
+
+int numberofRows (); // counts the rows in the file
+void readStudents (Stud *to_be_graded); // scans in the data from the file
+int sieve (Stud *to_be_graded, Filtered *applicable, int n, char DVW); // filters out students with unapplicable grades
+void sortbyName (Filtered *applicable, int applicable_amount, char DVW); // sorts by name
+int list (Filtered *applicable, int , Avg *student_list, char DVW); // makes a sorted list
+void average (Avg *student_list, Filtered *applicable, int applicable_amount, int student_amount, char DVW); // calculates each student's average
+void sortbyAverage (Avg *student_list, int student_amount, char DVW); // sorts by grade
+void money (Avg *student_list, int student_amount); // determines who gets the money and who gets the bill
+void bill (Avg *student_list, int student_amount); // outputs bills into file
+
+int main (void)
+{
+	char DVW;
+	printf ("Print all or silent? [p/s]");
+	do
+	{
+		scanf ("%c", &DVW);
+	} while (DVW != 'p' && DVW != 's');
+	printf ("\n\n");
+
+	int n;
+	n = numberofRows();
+
+	Stud to_be_graded[n];
+	Filtered applicable[n];
+	Avg student_list[n];
+	int applicable_amount;
+	int student_amount;
+
+	readStudents(to_be_graded);
+	printf ("\n\n");
+
+	applicable_amount = sieve (to_be_graded, applicable, n, DVW);
+
+	sortbyName (applicable, applicable_amount, DVW);
+
+	student_amount = list (applicable, applicable_amount, student_list, DVW);
+
+	average (student_list, applicable, applicable_amount, student_amount, DVW);
+
+	sortbyAverage (student_list, student_amount, DVW);
+
+	money (student_list, student_amount);
+
+	bill (student_list, student_amount);
+
+	return 0;
+}
+
+int numberofRows()
+{
+	FILE *data;
+	data = fopen ("andmed.txt", "r");
+
+	int read = 0;
+	int ch = 0;
+
+	if (data == NULL)
+	{
+		return 0;
+	}
+
+	while ((ch = fgetc (data)) != EOF)
+	{
+		if (ch == '\n')
+		{
+			read++;
+		}
+	}
+	fclose (data);
+
+	return read;
+}
+
+void readStudents (Stud *to_be_graded)
+{
+	FILE *data;
+	data = fopen ("andmed.txt", "r");
+
+	int i = 0;
+
+	while (fscanf (data, "%s %s %d", to_be_graded[i].name, to_be_graded[i].subj, &to_be_graded[i].grade) != EOF)
+	{
+		printf ("%d. %s, %s, %d\n", i+1, to_be_graded[i].name, to_be_graded[i].subj, to_be_graded[i].grade);
+		i++;
+	}
+	fclose (data);
+}
+
+int sieve (Stud *to_be_graded, Filtered *applicable, int n, char DVW)
+{
+	int i;
+	int j = 0;
+
+	for (i = 0; i < n; i++)
+	{
+		if (to_be_graded[i].grade >= 0 && to_be_graded[i].grade <= 5)
+		{
+			strcpy (applicable[j].name, to_be_graded[i].name);
+			applicable[j].grade = to_be_graded[i].grade;
+			j++;
+		}
+	}
+
+	if (DVW == 80 || DVW == 112)
+	{
+		for (i = 0; i < j; i++)
+		{
+			printf ("%d, %s, %d\n", i+1, applicable[i].name, applicable[i].grade);
+		}
+		printf ("\n\n");
+	}
+
+	return j;
+}
+
+void sortbyName (Filtered *applicable, int applicable_amount, char DVW)
+{
+	int i;
+	int j;
+	Filtered temp;
+
+	for (i = 0; i < applicable_amount; i++)
+	{
+		for (j = 1; j < applicable_amount; j++)
+		{
+			if (strcmp (applicable[j-1].name, applicable[j].name) > 0)
+			{
+				temp.grade = applicable[j-1].grade;
+				strcpy (temp.name, applicable[j-1].name);
+				applicable[j-1].grade = applicable[j].grade;
+				strcpy (applicable[j-1].name, applicable[j].name);
+				applicable[j].grade = temp.grade;
+				strcpy (applicable[j].name, temp.name);
+			}
+		}
+	}
+
+	if (DVW == 80 || DVW == 112)
+	{
+		for (i = 0; i < applicable_amount; i++)
+		{
+			printf ("%d, %s, %d\n", i+1, applicable[i].name, applicable[i].grade);
+		}
+		printf ("\n\n");
+	}
+
+}
+
+int list (Filtered *applicable, int applicable_amount, Avg *student_list, char DVW)
+{
+	int i;
+	int j = 0;
+
+	for (i = 0; i < applicable_amount; i++)
+	{
+		if (strcmp (applicable[i-1].name, applicable[i].name) != 0)
+		{
+			strcpy (student_list[j].name, applicable[i].name);
+			j++;
+		}
+	}
+
+	if (DVW == 80 || DVW == 112)
+	{
+		for (i = 0; i < j; i++)
+		{
+			printf ("%d, %s\n", i+1, student_list[i].name);
+		}
+		printf ("\n\n");
+	}
+
+	return j;
+}
+
+void average (Avg *student_list, Filtered *applicable, int applicable_amount, int student_amount, char DVW)
+{
+	int i;
+	int j;
+	int counter = 0;
+
+	for (i = 0; i < student_amount; i++)
+	{
+		for (j = 0; j < applicable_amount; j++)
+		{
+			if (strcmp (student_list[i].name, applicable[j].name) == 0)
+			{
+				student_list[i].grade += applicable[j].grade;
+				counter++;
+			}
+		}
+		student_list[i].average = (float)student_list[i].grade / (float) counter;
+		counter = 0;
+	}
+
+	if (DVW == 80 || DVW == 112)
+	{
+		for (i = 0; i < student_amount; i++)
+		{
+			printf ("%d,  %s,  %d,  %f\n", i+1, student_list[i].name, student_list[i].grade, student_list[i].average);
+		}
+		printf ("\n\n");
+	}
+
+}
+
+void sortbyAverage (Avg *student_list, int student_amount, char DVW)
+{
+	int i, j;
+	Avg temp;
+
+	for (i = 0; i < student_amount; i++)
+	{
+		for (j = 1; j < student_amount; j++)
+		{
+			if (student_list[j-1].average < student_list[j].average)
+			{
+				temp = student_list[j-1];
+				student_list[j-1] = student_list[j];
+				student_list[j] = temp;
+			}
+		}
+	}
+
+	if (DVW == 80 || DVW == 112)
+	{
+		for (i = 0; i < student_amount; i++)
+		{
+			printf ("%d, %s, %f\n", i+1, student_list[i].name, student_list[i].average);
+		}
+		printf ("\n\n");
+	}
+
+}
+
+void money (Avg *student_list, int student_amount)
+{
+	int i;
+	int counter = 0;
+
+	printf ("The money goes to: \n");
+	for (i = 0; i < 3; i++)
+	{
+		printf ("%s, with an average of: %f\n", student_list[i].name, student_list[i].average);
+	}
+	counter = i;
+
+	do
+	{
+		if (student_list[counter].average == student_list[2].average)
+		{
+			printf ("%s, with an average of: %f\n", student_list[counter].name, student_list[counter].average);
+			counter++;
+		}
+		else
+		{
+			break;
+		};
+	} while (student_list[i].average == student_list[2].average);
+	printf ("\n\n");
+
+
+	printf ("The bills go to: \n");
+	for (i = student_amount - 3; i < student_amount; i++)
+	{
+		printf ("%s, with an average of: %f\n", student_list[i].name, student_list[i].average);
+	}
+
+	counter = student_amount - 4;
+
+	do
+	{
+		if (student_list[counter].average == student_list[i - 3].average)
+		{
+			printf ("%s, with an average of: %f\n", student_list[counter].name, student_list[counter].average);
+			counter--;
+		}
+		else
+		{
+			break;
+		};
+	} while (student_list[counter].average == student_list[i - 3].average);
+
+}
+
+void bill (Avg *student_list, int student_amount)
+{
+	int counter;
+	int i;
+
+	FILE *output;
+	output = fopen ("bill.txt", "w");
+
+	fprintf (output, "The bills go to: \n");
+	for (i = student_amount - 3; i < student_amount; i++)
+	{
+		fprintf (output, "%s, with an average of: %.2f\n", student_list[i].name, student_list[i].average);
+	}
+
+	counter = student_amount - 4;
+
+	do
+	{
+		if (student_list[counter].average == student_list[i - 3].average)
+		{
+			fprintf (output, "%s, with an average of: %f\n", student_list[counter].name, student_list[counter].average);
+			counter--;
+		}
+		else
+		{
+			break;
+		};
+	} while (student_list[counter].average == student_list[i - 3].average);
+
+	fclose (output);
+}