move exercises and lectures into subfolders

Lectures/LC18/EndOfFile/EndOfFile.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// Main () - execution starts here
+int main (void)
+{
+    // Declate file stream variables
+    FILE *fInput, *fOutput;
+
+    // Other variables needed
+    int i,d;
+
+    // Try and open the text "sample.txt" (in the current directory) file for writing
+    fOutput = fopen ("numbers.txt", "w");
+
+    // Check we were able to open the file
+    if ( fOutput == NULL)
+    {
+        printf ("\nthe file could not be opened for writing, exiting");
+        return -1;
+    }
+
+    // Use a loop to write values to the newly created file
+    for ( i = 1 ; i <= 10 ; i++)
+    {
+        fprintf (fOutput, "%d\n", i);
+    }
+
+    // And close the file
+    fclose (fOutput);
+
+    // Try and open the binary "numbers " (in the current directory) file for reading
+
+    fInput = fopen ("numbers.txt", "r");
+
+    // Check we were able to open the file
+    if ( fInput == NULL)
+    {
+        printf ("\nthe file could not be opened for reading, exiting");
+        return -1;
+    }
+
+    // Read, line by line the 10 values written into variable d
+    // and then display the contents of d on the screen
+    while (!feof(fInput))
+    {
+        fscanf (fInput, "%d", &d);
+        printf ("Value read from file %d\n",d);
+    }
+
+    // And close the file
+    fclose (fInput);
+
+    return (0);     // Exit indicating success
+}

Lectures/LC18/EndOfFile/numbers.txt

@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10

Lectures/LC18/EndOfFileBreak/EndOfFileBreak.c

@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// Main () - execution starts here
+int main (void)
+{
+    // Declate file stream variables
+    FILE *fInput, *fOutput;
+
+    // Other variables needed
+    int i,d;
+
+    // Try and open the text "sample.txt" (in the current directory) file for writing
+    fOutput = fopen ("numbers.txt", "w");
+
+    // Check we were able to open the file
+    if ( fOutput == NULL)
+    {
+        printf ("\nthe file could not be opened for writing, exiting");
+        return -1;
+    }
+
+    // Use a loop to write values to the newly created file
+    for ( i = 1 ; i <= 10 ; i++)
+    {
+        fprintf (fOutput, "%d\n", i);
+    }
+
+    // And close the file
+    fclose (fOutput);
+
+    // Try and open the binary "numbers " (in the current directory) file for reading
+
+    fInput = fopen ("numbers.txt", "r");
+
+    // Check we were able to open the file
+    if ( fInput == NULL)
+    {
+        printf ("\nthe file could not be opened for reading, exiting");
+        return -1;
+    }
+
+    // Read, line by line the 10 values written into variable d
+    // and then display the contents of d on the screen
+    while (1)
+    {
+        fscanf (fInput, "%d", &d);
+        if ( feof(fInput))
+            break;
+        printf ("Value read from file %d\n",d);
+    }
+
+    // And close the file
+    fclose (fInput);
+
+    return (0);     // Exit indicating success
+}

Lectures/LC18/EndOfFileBreak/numbers.txt

@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10

Lectures/LC18/EndOfFileScanf/EndOfFileScanf.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+// Main () - execution starts here
+int main (void)
+{
+    // Declate file stream variables
+    FILE *fInput, *fOutput;
+
+    // Other variables needed
+    int i,d;
+
+    // Try and open the text "sample.txt" (in the current directory) file for writing
+    fOutput = fopen ("numbers.txt", "w");
+
+    // Check we were able to open the file
+    if ( fOutput == NULL)
+    {
+        printf ("\nthe file could not be opened for writing, exiting");
+        return -1;
+    }
+
+    // Use a loop to write values to the newly created file
+    for ( i = 1 ; i <= 10 ; i++)
+    {
+        fprintf (fOutput, "%d\n", i);
+    }
+
+    // And close the file
+    fclose (fOutput);
+
+    // Try and open the binary "numbers " (in the current directory) file for reading
+
+    fInput = fopen ("numbers.txt", "r");
+
+    // Check we were able to open the file
+    if ( fInput == NULL)
+    {
+        printf ("\nthe file could not be opened for reading, exiting");
+        return -1;
+    }
+
+    // Read, line by line the 10 values written into variable d
+    // and then display the contents of d on the screen
+    while (fscanf (fInput, "%d", &d) != EOF)
+    {
+        printf ("Value read from file %d\n",d);
+    }
+
+    // And close the file
+    fclose (fInput);
+
+    return (0);     // Exit indicating success
+}

Lectures/LC18/EndOfFileScanf/numbers.txt

@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10

Lectures/LC18/FileMove/filemove.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+/* Example 3 - jumping & getting element count */
+
+int main(void)
+{
+
+	 int ValRead;
+	 int Item;
+	 int Locn;
+	 FILE *fptr;
+	 /* Open the file from example 1 */
+
+	 fptr = fopen ("data.dat","rb");
+	 if ( fptr == NULL )                                             
+	 {
+	   printf ("\nError opening input file - aborting ");
+	   exit (0);
+	 }
+	 
+	 /* Ask the user which value to jump to */
+	 printf ("\nWhich value do you wish to view ? ");
+	 scanf ("%d",&Item);
+	 
+	 /* Jump to this item                    */
+	 /* notice we move in steps of item size */    
+	 
+	 Locn = Item * sizeof(int);
+	 fseek (fptr, Locn, SEEK_SET);
+	 
+	 /* And read a single integer in */
+	 if (fread (&ValRead, sizeof(int), 1, fptr ) == 1)
+	 {
+		/* Display the read value */
+		printf ("Item %d is %d\n",Item,ValRead);
+	 }
+	 else
+	 	printf("Failed to read at location %d\n", Item);
+								   
+	 /* And close */
+	 fclose (fptr); 
+	 
+	 /* All Done */
+	return 0;
+	
+}
+ 

Lectures/LC18/FileSize/filesize.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+/* Example 3 - jumping & getting element count */
+
+int main()
+{
+
+ long FileBytes;
+ FILE *fptr;
+ /* Open the file from example 1 */
+
+ fptr = fopen ("data.dat","rb");
+ if ( fptr == NULL )                                             
+ {
+   printf ("\nError opening input file - aborting ");
+   exit (0);
+ }
+                         
+ /* Move to the end of file */
+ fseek (fptr, 0, SEEK_END);
+                              
+ /* Get the byte size */
+ FileBytes = ftell(fptr);
+ 
+ /* Convert to size based on fact all int's */
+ FileBytes = FileBytes / sizeof(int);
+ 
+ /* Display the read value */
+ printf ("No. of items in file is %ld\n",FileBytes);
+                               
+ /* And close */
+ fclose (fptr); 
+ 
+ /* All Done */
+ return 0;
+}
+