added bits test

chp07/bits/bitsTest.cpp

@@ -0,0 +1,27 @@
+/* Bits test by Derek Molloy */
+
+#include<iostream>
+#include<stdint.h>
+#include<bitset>
+#include<sstream>
+#include<iomanip>
+using namespace std;
+
+string display(uint8_t a) {
+   stringstream ss;
+   ss << setw(3) << (int)a << "(" << bitset<8>(a) << ")";
+   return ss.str();
+}
+
+int main(){
+   uint8_t a = 25, b = 5;
+   cout << "A is " << display(a) << " and B is " << display(b) << endl;
+   cout << "A & B  (AND) is " << display(a & b) << endl;
+   cout << "A | B  (OR)  is " << display(a | b) << endl;
+   cout << "  ~A   (NOT) is " << display(~a) << endl;
+   cout << "A ^ B  (XOR) is " << display(a ^ b) << endl;
+   cout << "A << 1 (LSL) is " << display(a << 1) << endl;
+   cout << "B >> 1 (LSR) is " << display(b >> 1) << endl;
+   cout << "1 << 8 (LSL) is " << display(1 << 8) << endl; // ignore warning!
+   return 0;
+}