有以下类定义 #include using namespace std; class Clock {public: Clock(int NewH=0, int NewM=0, int NewS=0) {Hour=NewH; Minute=NewM;Second=NewS;} void ShowTime() {cout<=60) {   Second=Second-60; Minute++; if(Minute>=60) { Minute=Minute-60; Hour++; Hour=Hour%24;}} return ________;} int main() {   Clock c1; (++c1).ShowTime(); return 0;} 请为横线处选择合适的程序使得程序的运行结果是0:0:1 （      ）

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