move exercises and lectures into subfolders

Exercises/C5/FormattingNumbers/formatting_numbers.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void)
+{
+    // Declare some variables
+    int a = 123;
+    float f = 12.456f;
+
+    // Use printf display text on the screen
+    printf ("Examples of integer formatting\n");
+    printf ("a = %d (no modifier)\n", a);
+    printf ("a = %6d (w:6, justify:right)\n", a);
+    printf ("a = %-6d (w:6 )\n", a);
+
+    // Use printf display text on the screen
+    printf ("Examples of float formatting\n");
+    printf ("f = %f (no modifier)\n", f);
+    printf ("f = %6.2f (w:6, 2dp, justify:right)\n", f);
+    printf ("f = %-6.1f (w:6, 1dp)\n", f);
+
+    // Exit from main
+    return 0;
+}