建議不要使用內置類型，而是使用類 比如： 不要使用int，而是使用Int 不要使用unsigned，該用Unsigned ..... 這樣就不會出現所謂的垃圾值 scpp_types.h： [cpp] #ifndef __SCCP_TYPES_H__ #define __SCCP_TYPES_H__ #include <ostream> #include "scpp_assert.h" template <typename T> class TNumber { public: TNumber(const T& x =0 ) :data_(x) { } operator T() const { return data_; } TNumber &operator = (const T& x) { data_ = x; return *this; } TNumber operator ++(int) { TNumber<T> copy(*this); ++data_; return copy; } TNumber operator ++() { ++data_; return *this; } TNumber& operator += (T x) { data_ += x; return *this; } TNumber& operator -= (T x) { data_ -= x; return *this; } TNumber& operator *= (T x) { data_ *= x; return *this; } TNumber& operator /= (T x) { SCPP_ASSERT(x != 0, "Attempt to divide by 0"); data_ /= x; return *this; } T operator / (T x) { SCPP_ASSERT(x != 0, "Attempt to divide by 0"); return data_ / x; } private: T data_; }; typedef long long int64; typedef unsigned long long unsigned64; typedef TNumber<int> Int; typedef TNumber<unsigned> Unsigned; typedef TNumber<int64> Int64; typedef TNumber<unsigned64> Unsigned64; typedef TNumber<float> Float; typedef TNumber<double> Double; typedef TNumber<char> Char; class Bool { public: Bool(bool x = false) :data_(x) { } operator bool () const { return data_; } Bool& operator = (bool x) { data_ = x; return *this; } Bool& operator &= (bool x) { data_ &= x; return *this; } Bool& operator |= (bool x) { data_ |= x; return *this; } private: bool data_; }; inline std::ostream& operator << (std::ostream& os, Bool b) { if (b) { os << "True"; } else { os << "False"; } return os; } 測試代碼(vs2012+win7環境)： [cpp] #include "stdafx.h" #include "scpp_assert.h" #include "iostream" #include "scpp_vector.h" #include "scpp_array.h" #include "scpp_matrix.h" #include "algorithm" #include "scpp_types.h" int _tmain(int argc, _TCHAR* argv[]) { Int dataInt; Double dataDouble1(1.2); Double dataDouble2; Char c; std::cout << dataInt << std::endl; std::cout << dataDouble1 << std::endl; std::cout << dataDouble2 << std::endl; std::cout << dataInt++ << std::endl; std::cout << ++dataInt << std::endl; std::cout << c << std::endl; c = 'x'; std::cout << c << std::endl; // dataDouble1 /= dataDouble2; dataDouble1 = dataDouble1 / dataDouble2; return 0; }
