操作系統(tǒng)課程設(shè)計(jì)報(bào)告(編輯修改稿)
2025-07-26 14:04 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 三、程序流程圖開 始就緒隊(duì)列隊(duì)首進(jìn)程加入運(yùn)行隊(duì)列運(yùn)行隊(duì)列是否為空？結(jié)束是否延時(shí)1秒:當(dāng)前運(yùn)行進(jìn)程優(yōu)先數(shù)減1當(dāng)前運(yùn)行進(jìn)程運(yùn)行時(shí)間加1當(dāng)前運(yùn)行進(jìn)程還需時(shí)間減1所需時(shí)間是否為0？否是設(shè)進(jìn)程狀態(tài)為完成,將該進(jìn)程加入完成隊(duì)列,將運(yùn)行隊(duì)列設(shè)為空.就緒隊(duì)列是否為空？否是就緒隊(duì)列是否為空？是否就緒隊(duì)列隊(duì)首進(jìn)程加入到運(yùn)行隊(duì)列中.就緒隊(duì)列隊(duì)首進(jìn)程的優(yōu)先數(shù)是否大于當(dāng)前運(yùn)行進(jìn)程的優(yōu)先數(shù)？否是.四、源代碼include include iostreaminclude include stringusing namespace std。int n。class PCB{public:string proame。//進(jìn)程名int pri。//進(jìn)程優(yōu)先數(shù)string state。//進(jìn)程狀態(tài)int runtime。//進(jìn)程已運(yùn)行CPU時(shí)間int needOftime。//還需要時(shí)間PCB *next。//指針}。PCB *run = NULL。 //運(yùn)行隊(duì)列頭指針PCB *ready = NULL。//就緒隊(duì)列頭指針PCB *finish = NULL。//完成隊(duì)列頭指針void Dtime(int t){time_t current_time。time_t start_time。time(amp。start_time)。do{time(amp。 current_time)。}while((current_timestart_time)t)。}void Prinft(){PCB *p。system(cls)。//清屏p=run。if(p!=NULL){pnext=NULL。}cout當(dāng)前正在運(yùn)行的進(jìn)程：endl。cout進(jìn)程名稱\t優(yōu)先數(shù)\t還需要時(shí)間\t已運(yùn)行時(shí)間\t狀態(tài):endl。while(p!=NULL){coutpproame\t\tppri\tpneedOftime\t\tpruntime\t\tpstateendl。p=pnext。}coutendlendl。cout當(dāng)前的就緒隊(duì)列：endl。cout進(jìn)程名稱\t優(yōu)先數(shù)\t還需要時(shí)間\t已運(yùn)行時(shí)間\t狀態(tài):e
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