实验四 页式虚拟存储管理中地址转换和页式中断 FIFO LRU OPT C(9)

页式虚拟存储管理

}

}

}

void changeLRU(int n)

{

int i=0;

int flag=1;

page *p,*delect;

p=head->next;

while(p)

{

if(p->address==0)

{

flag=0;

p->address=n;

printf("Change the page %d\n",i+1);

break;

}

p=p->next;

i++;

}

if(flag)

{

delect=head->next;

head->next=delect->next;

printf("Delect from the head, and add new to the end.\n"); delect->address=n;

rear->next=delect;

rear=delect;

rear->next=NULL;

}

}

float OPT()

{

int i;

int lose=0;

float losef;

float percent;

for(i=0;i<N;i++)

{

if(search(A[i])==0)

{

lose++;

changeOPT(A[i],i);

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