move exercises and lectures into subfolders

Lectures/LC5/printf_example.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(void)
+{
+	int a,b,c,sum;		/* Define variables */
+	a = 1;					/* Assign values */
+	b = 2;
+	c = 3;
+	sum = a + b + c ;	/* Calculate sum & Display */
+
+  	printf ("\nThe sum of %d + %d + %d is %d \n", a, b, c, sum);
+
+  	return 0;				/* Return from prog */
+}