Diff: main.cpp

Revision:

0:cb82516f2dce

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 02 14:24:48 2017 +0000
@@ -0,0 +1,36 @@
+/* ELEC1620 Lab 2 Task 10
+
+Bit-wise Operators
+
+(c) Dr Craig A. Evans, Feb 2017
+
+*/
+#include "mbed.h"
+
+int main()
+{
+    char a = 34;  // 0010 0010
+    char b = 107; // 0110 1011
+    printf("a = %i\n",a);
+    printf("b = %i\n",b);
+
+    printf("We'll shift a by one place to the left and store in c.\n");
+    printf("This is the same as multiplying by 2.\n");
+    char c = a << 1;  // 0100 0100 = 64 + 4 = 68
+    printf("c = %i\n",c);
+
+    printf("We'll shift b by fives place to the right and store in d.\n");
+    printf("This is the same as dividing by 2^5 = 32.\n");
+    char d = b >> 5;  // 0000 0011 = 2 + 1 = 3
+    printf("d = %i\n",d);
+    printf("Remember, these are integers so we lose the decimal places.\n");
+
+    printf("Now we'll set bit 6 of c using the bit-wise OR operation.\n");
+    char e = c | (1<<6);  // 0100 0100 | 0100 0000
+    printf("It turns out bit 6 is already set and so the value doesn't change.\n");
+    printf("e = %i\n",e);
+
+    printf("Finally we'll clear bit 2 of c using the bit-wise AND and NOT operation.\n");
+    char f = c & ~(1<<2);  // 0100 0100 & 1111 1011 = 0100 0000
+    printf("f = %i\n",f);
+}