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