SemaphoreS=，S=S=;voidR(){intx;while(){从输入设备上读一个数；X=接收的数；_()__;B=X;V(S);}}voidM(){while(){()_;加工B中的数据;V(S);}}voidP(){while(){()_;Z=B;()_____;打印Z中的数；}}main(){cobegin{R(）；M();P();}}评分规则P(S)P(S)P(S)V(S)