Currency conversions

3rd-party/ttmath-0.9.3/samples/int.cpp

@@ -0,0 +1,92 @@
+#include <ttmath/ttmath.h>
+#include <iostream>
+
+
+void SimpleCalculating(const ttmath::Int<2> & a, const ttmath::Int<2> & b)
+{
+	std::cout << "Simple calculating" << std::endl;
+	std::cout << "a = " << a << std::endl;
+	std::cout << "b = " << b << std::endl;
+	std::cout << "a + b = " << a+b << std::endl;
+	std::cout << "a - b = " << a-b << std::endl;
+	std::cout << "a * b = " << a*b << std::endl;
+	std::cout << "a / b = " << a/b << std::endl;
+}
+
+
+void CalculatingWithCarry(const ttmath::Int<2> & a, const ttmath::Int<2> & b)
+{
+ttmath::Int<2> atemp;
+
+	std::cout << "Calculating with a carry" << std::endl;
+	std::cout << "a = " << a << std::endl;
+	std::cout << "b = " << b << std::endl;
+
+	atemp = a;
+	if( !atemp.Add(b) )
+		std::cout << "a + b = " << atemp << std::endl;
+	else
+		std::cout << "a + b = (carry) " << atemp << std::endl;
+
+	atemp = a;
+	if( !atemp.Sub(b) )
+		std::cout << "a - b = " << atemp << std::endl;
+	else
+		std::cout << "a - b = (carry) " << atemp << std::endl;
+		
+	atemp = a;
+	if( !atemp.Mul(b) )
+		std::cout << "a * b = " << atemp << std::endl;
+	else
+		std::cout << "a * b = (carry: the result is too big) " << std::endl;
+		// it have no sense to print 'atemp' (it's undefined)
+		
+	atemp = a;
+	if( !atemp.Div(b) )
+		std::cout << "a / b = " << atemp << std::endl;
+	else
+		std::cout << "a / b = (division by zero) " << std::endl;
+	
+}
+
+int main()
+{
+// on 32bit platforms: 'a' and 'b' have 2-words (two 32bit words)
+// it means a,b are from <-2^63, 2^63 - 1>
+ttmath::Int<2> a,b;
+	
+	// conversion from int
+	a = 123456;
+	
+	// conversion from 'const char *'
+	b = "98767878";
+	
+	SimpleCalculating(a,b);
+	
+	// 'a' will have the max value which can be held in this type
+	a.SetMax();
+	
+	// conversion from 'int'
+	b = 10;
+	
+	CalculatingWithCarry(a,b);
+}
+
+/*
+the result (on 32 bit platform):
+
+Simple calculating
+a = 123456
+b = 98767878
+a + b = 98891334
+a - b = -98644422
+a * b = 12193487146368
+a / b = 0
+Calculating with a carry
+a = 9223372036854775807
+b = 10
+a + b = (carry) -9223372036854775799
+a - b = 9223372036854775797
+a * b = (carry) the result is too big) 
+a / b = 922337203685477580
+*/