C语言实现短作业优先调度算法.doc

#include stdio.hstruct sjfchar name10;float arrivetime;float servicetime;float starttime;float finishtime;float zztime;float dqzztime;float cckj;float yxtime;sjf a100;void input(sjf *p,int N) int i;printf(输入作业名 & 到达时间 &服务时间 &存储空间:n 例如: a 0 100 33n);for(i=0;i=N-1;i+)printf(输入第 %d作业信息:n,i+1);scanf(%s%f%f%f,&,&pi.arrivetime,&pi.servicetime,&pi.cckj);void Print(sjf *p,float arrivetime,float servicetime,float starttime,float finishtime,float zztime,float dqzztime,float cckj,int N)int k;printf(作业执行顺序:);printf(%s,);for(k=1;k%s,); printf(n作业信息:n);printf(nnamet arrivet servicet startt finisht zzt dqzzt cckjt ddsjt yxtimen);for(k=0;k=N-1;k+) printf(%st %-.2ft %-.2ft %-.2ft %-.2ft %-.2ft %-.2ft %-.2ft %-.2ft %-.2fn,,pk.arrivetime,pk.servicetime,pk.starttime,pk.finishtime,pk.zztime,pk.dqzztime,pk.cckj,pk.finishtime-pk.servicetime,pk.servicetime);/pai xuvoid sort(sjf *p,int N)for(int i=0;i=N-1;i+)for(int j=0;j=i;j+)if(pi.arrivetimepj.arrivetime)sjf temp;temp=pi;pi=pj;pj=temp;/yun xing jieduanvoid deal(sjf *p, float arrivetime,float servicetime,float starttime,float finishtime,float &zztime,float &dqzztime,float cckj,int N) int k;for(k=0;k=N-1;k+)if(k=0) pk.starttime=pk.arrivetime;pk.finishtime=pk.arrivetime+pk.servicetime;elsepk.starttime=pk-1.finishtime;pk.finishtime=pk-1.finishtime+pk.servicetime;for(k=0;k=N-1;k+)pk.zztime=pk.finishtime-pk.arrivetime;pk.dqzztime=pk.zztime/pk.servicetime;void sjff(sjf *p,int N)float arrivetime=0,servicetime=0,starttime=0,finishtime=0,zztime=0,dqzztime=0,cckj=0;sort(p,N);for(int m=0;mN-1;m+)if(m=0)pm.finishtime=pm.arrivetime+pm.servicetime;elsepm.finishtime=pm-1.finishtime+pm.servicetime;int i=0;for(int n=m+1;n=N-1;n+)if(pn.arrivetime=pm.finishtime)i+;float min=pm+1.servicetime;int next=m+1;/m+1=nfor(int k=m+1;km+i;k+)if(pk+1.servicetimemin)min=pk+1.servicetime;next=k+1;sjf temp;temp=pm+1;pm+1=pnext;pnext=temp;deal(p,arrivetime,servicetime,starttime,finishtime,zztime,dqzztime,cckj,N);Print(p,arrivetime,servicetime,starttime,finishtime,zztime,dqzztime,cckj,N);void main() int N;printf(*n);printf( 短作业优先调度算法n);printf(