c語言編寫進程的創建與撤銷

c語言編寫進程的創建與撤銷

操作系統：c語言編寫進程的創建與撤銷

最佳回答：

struct pb
{int n;
int k;
int cha;};
typedef struct pb PCB;
PCB a[10];

void creat()
{static int pi=1;
int k,l=0,m;
printf("plase input n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
     l=1;
if (l==1)
 {printf("error!\n");
  creat(); }
else
 {a[pi].n=m;
printf("\n");
printf("plase input k0:");
scanf("%d",&a[pi].k);
printf("\n");
a[pi++].cha=4;}}

void destory()
{int i,num,k=0;
printf(" plase input destory number:");
scanf("%d",&num);
for(i=1;i<=10;i++)
if(a[i].n==num) k=i;
if(k!=0)
{a[k].n=0;a[k].k=0;a[k].cha=0;}
else
printf("No have this destory number!\n");}

void wakeup()
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
a[l].cha=1;  /*喚醒->靜止就緒*/}

void active()
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
a[l].cha=3; /*激活->活動就緒*/}

void dse()
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
a[l].cha=4;  /*阻塞->活動阻塞*/}

void swpend()
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
a[l].cha=2; /* 掛起->靜止阻塞 */}

void look()
{int i;
printf("\t\tpcb n0  k0 cha\n");
for (i=1;i<=10;i++)
printf("\t\t%d\t%d\t%d\t%d\n",i,a[i].n,a[i].k,a[i].cha);
printf("\t1--靜止就緒   2--靜止阻塞  3--活動就緒  4--活動阻塞   5--運行\n");}

void zt()   /* 改變狀態*/
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
printf("請輸入當前狀態:");
scanf("%d",&a[l].cha);
look();}

void yxs()  /*改變優先數*/
{int i,k,m,l;
printf("請輸入n0:");
scanf("%d",&m);
for(k=1;k<=10;k++)
if (a[k].n==m)
l=k;
printf("請輸入優先數:");
scanf("%d",&a[l].k);
look();}

main()
{int d;
clrscr();
do
{
printf("\t\t*************** CHOICE *****************\n");
printf("\t\t*      1--------------進程創建         *\n");
printf("\t\t*      2--------------進程撤消         *\n");
printf("\t\t*      3--------------阻塞             *\n");
printf("\t\t*      4--------------喚醒             *\n");
printf("\t\t*      5--------------掛起             *\n");
printf("\t\t*      6--------------激活             *\n");
printf("\t\t*      7--------------查看狀態         *\n");
printf("\t\t*      8--------------改變狀態         *\n");
printf("\t\t*      9--------------改變優先數       *\n");
printf("\t\t*      0--------------退出             *\n");
printf("\t\t****************************************\n");
printf("\t\t請選擇(0-9):");
scanf("%d",&d);
printf("\n");
switch(d)
{
case 1: creat();break;
case 2: destory();break;
case 3: dse();break;
case 4: wakeup();break;
case 5: swpend();break;
case 6: active();break;
case 7:look();break;
case 8:zt();break;
case 9:yxs();break;
case 0: exit(0);
}
}
while(d!=0);
}