Initial commit

2019-11-15 12:59:38 +01:00
parent 40a414d210
commit b880c3ccde
6814 changed files with 379441 additions and 0 deletions
@@ -0,0 +1,30 @@
+Fig02_11.cpp - Recursive exponentiation algorithm, with a test program
+	
+	#include <iostream.h>
+
+        bool isEven( int n )
+        {
+            return n % 2 == 0;
+        }
+
+/* START: Fig02_11.txt*/
+        long pow( long x, int n )
+        {
+/* 1*/      if( n == 0 )
+/* 2*/          return 1;
+/* 3*/      if( n == 1 )
+/* 4*/          return x;
+/* 5*/      if( isEven( n ) )
+/* 6*/          return pow( x * x, n / 2 );
+            else
+/* 7*/          return pow( x * x, n / 2 ) * x;
+        }
+/* END */
+
+        // Test program
+        int main( )
+        {
+            cout << "2^21 = " << pow( 2, 21 ) << endl;
+            cout << "2^30 = " << pow( 2, 30 ) << endl;
+            return 0;
+        }