Decided against the start-of-file comment.

[bigint/bigint.git] / sample.cc

diff --git a/sample.cc b/sample.cc
index a560e6b..0fd9ee4 100644 (file)
--- a/sample.cc
+++ b/sample.cc
@@ -1,9 +1,7 @@
 /*
-* Matt McCutchen's Big Integer Library
-*
-* Sample program demonstrating the most important features of the Big
-* Integer Library
-*/
+ * Sample program demonstrating the most important features of the Big
+ * Integer Library
+ */
 
 // Standard libraries
 #include <string>
@@ -19,53 +17,60 @@ int main() {
        try {
                BigInteger a; // a is 0
                int b = 535;
-               
+
                a = b; // From int to BigInteger...
                b = a; // ...and back, no casts required!
                /*
-               * If a were too big for an int you'd get a runtime exception.
-               * The Big Integer Library throws C-strings (that is,
-               * `const char *'s) when something goes wrong.  It's a good idea
-               * to catch them; the `try/catch' construct wrapping all this
-               * code is an example of how to do this.  Some C++ compilers need
-               * a special command-line option to compile code that uses
-               * exceptions.
-               */
-               
+                * If a were too big for an int you'd get a runtime exception.
+                * The Big Integer Library throws C-strings (that is,
+                * `const char *'s) when something goes wrong.  It's a good idea
+                * to catch them; the `try/catch' construct wrapping all this
+                * code is an example of how to do this.  Some C++ compilers need
+                * a special command-line option to compile code that uses
+                * exceptions.
+                */
+
                BigInteger c(a); // Copy a BigInteger.
-               
+
                // d is -314159265.  The `int' literal is converted to a
                // BigInteger.
                BigInteger d(-314159265);
-               
+
                // This won't compile because the number is too big to be an
                // integer literal.
                //BigInteger e(3141592653589793238462643383279);
-               
+
                // Instead you can convert the number from a string.
                std::string s("3141592653589793238462643383279");
                BigInteger f = easyStringToBI(s);
-               
+
                // You can convert the other way too.
                std::string s2 = easyBItoString(f); 
-               
+
                // f is stringified and send to std::cout.
                std::cout << f << std::endl;
-               
+
                /*
-               * Let's do some math!
-               *
-               * The Big Integer Library provides lots of overloaded operators
-               * and corresponding assignment operators.  So you can do `a + b'
-               * with BigIntegers just as with normal integers.  The named
-               * methods `add', `divideWithRemainder', etc. are more advanced
-               * ``put-here operations''; see `BigUnsigned.hh' for details.
-               */
+                * Let's do some math!
+                *
+                * The Big Integer Library provides lots of overloaded operators
+                * and corresponding assignment operators.  So you can do `a + b'
+                * with BigIntegers just as with normal integers.  The named
+                * methods `add', `divideWithRemainder', etc. are more advanced
+                * ``put-here operations''; see `BigUnsigned.hh' for details.
+                */
                BigInteger g(314159), h(265);
-               // All five ``return-by-value'' operators.
+               // All five ``return-by-value'' arithmetic operators.
                std::cout << (g + h) << '\n' << (g - h) << '\n' << (g * h)
                        << '\n' << (g / h) << '\n' << (g % h) << std::endl;
-               
+
+               BigUnsigned i(0xFF0000FF), j(0x0000FFFF);
+               // All five ``return-by-value'' bitwise operators.
+               std::cout.flags(std::ios::hex | std::ios::showbase);
+               std::cout << (i & j) << '\n' << (i | j) << '\n' << (i ^ j) << '\n'
+                       << (j << 21) << '\n' << (j >> 10) << '\n';
+               std::cout.flags(std::ios::dec);
+
                // Let's do some heavy lifting and calculate powers of 314.
                int maxPower = 10;
                BigUnsigned x(1), big314(314);
@@ -73,18 +78,18 @@ int main() {
                        std::cout << "314^" << power << " = " << x << std::endl;
                        x *= big314; // A BigInteger assignment operator
                }
-               
+
                /*
-               * If you want to experiment with the library,
-               * you can add your own test code here.
-               */
+                * If you want to experiment with the library,
+                * you can add your own test code here.
+                */
                // std::cout << "Beginning of custom test code:" << std::endl;
-               
+
        } catch(char const* err) {
                std::cout << "The library threw an exception:\n"
                        << err << std::endl;
        }
-       
+
        return 0;
 }
 
@@ -97,6 +102,11 @@ Running the sample program produces this output:
 83252135
 1185
 134
+0xFF
+0xFF00FFFF
+0xFF00FF00
+0x1FFFE00000
+0x3F
 314^0 = 1
 314^1 = 314
 314^2 = 98596
@@ -109,4 +119,4 @@ Running the sample program produces this output:
 314^9 = 29673367320587092457984
 314^10 = 9317437338664347031806976
 
-*/
+ */