modified number.c file

labs/lab10/number.c

+/**
+ * File: number.c
+ * Author: Gurcan Gulec
+ * Created: 30 November 2016
+ * Last edit: 01 December 2016
+ *
+ * Description: Homework about files for lab 10.
+ *
+ */
+
 #include <stdio.h>
-#include <stdlib.h>
+#include <stdlib.h> // for atoi function
 
 int main()
 {
+	// creating the file pointers we are going to need
+
 	FILE *fp = fopen("bad_input.txt", "r");
 	FILE *ep = fopen("even.txt", "w");
 	FILE *op = fopen("odd.txt", "w");
 
+	// char string we are going to use with fgets function
+
 	char number[10];
 	
+	// checking if the files was opened
+
 	if (fp == NULL || ep == NULL || op == NULL)
 	{
 		printf("File was not opened.\n");
@@ -17,6 +33,8 @@ int main()
 	{
 		printf("File was opened.\n");	
 
+		// creating a loop to check the lines
+		
 		while (fgets(number, 10, fp) != NULL)
 		{
 			int size;
@@ -29,6 +47,8 @@ int main()
 				}
 			}
 
+			// making sure the values are numbers only	
+			
 			for (int i = size-1; i >= 0; i--)
 			{
 
@@ -42,8 +62,13 @@ int main()
 			int myNumber;
 			if (size > 0)
 			{
+				// convertin string into an integer
+
 				myNumber = atoi(number);
 				
+				// finding out which ones are odd and which ones are even
+				// and writing them to files
+
 				if (myNumber % 2)
 				{
 					fprintf(op, "%d\n", myNumber);
@@ -55,6 +80,8 @@ int main()
 			}
 		}
 
+		// closing the files
+
 		fclose(fp);	
 		fclose(ep);
 		fclose(op);