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摘要： namespace ltl{template <class T>void swap(T &a, T &b) { T c = a; a = b; b = c; }class CSize : public SIZE{public:CSize() {}CSize(int lx, int ly) { cx = lx, cy = ly; }void Set(int lx, int ly) { cx = lx, cy = ly; }operator += (const SIZE &sz) { cx += sz.cx, cy += sz.cy; }operator -= 阅读全文