标题:算法该怎么改 才能保证前三个数没有重复
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算法该怎么改 才能保证前三个数没有重复
#include <stdio.h>
#include <stdlib.h>
//#include<conio.h>
/*全局变量*/
int mSIZE; /*物理块数*/
int pSIZE; /*页面号引用串个数*/
static int memery[10]={0}; /*物理块中的页号*/
static int page[100]={0}; /*页面号引用串*/
static int temp[100][10]={0}; /*辅助数组*/
static char name[]=""; /*设置姓名*/
static char grade[]=""; /*设置班级*/
/*置换算法函数*/
void FIFO();
void LRU();
void OPT();
/*辅助函数*/
void print(unsigned int t);
void download();

/*主函数*/
void main()
{
    int i,k,code;
        //designBy();
        printf("┃请按任意键进行初始化操作... ┃\n");
        printf("┗━━━━━━━━━━━━━┛\n");
        printf(" >>>");
        printf("请输入物理块的个数(M<=10):");
        scanf("%d",&mSIZE);
        printf("请输入页面号引用串的个数(P<=100):");
        scanf("%d",&pSIZE);
        puts("请依次输入页面号引用串(连续输入,无需隔开):");
        for(i=0;i<pSIZE;i++)
        scanf("%1d",&page[i]);
       download();
    do{
         puts("输入的页面号引用串为:");
         for(k=0;k<=(pSIZE-1)/20;k++)
           {
             for(i=20*k;(i<pSIZE)&&(i<20*(k+1));i++)
                 {
                    if(((i+1)%20==0)||(((i+1)%20)&&(i==pSIZE-1)))
                         printf("%d\n",page[i]);
                    else
                         printf("%d   ",page[i]);
                  }
            }
          printf("* * * * * * * * * * * * * * * * * * * * * * *\n");
          printf("* 请选择页面置换算法:\t\t\t    *\n");
          printf("* ----------------------------------------- *\n");
          printf("* 1.先进先出(FIFO)    2.最近最久未使用(LRU) \n");
          printf("* 3.最佳(OPT)         4.退出      *\n");
          printf("* * * * * * * * * * * * * * * * * * * * * * *\n");
          printf("请选择操作:[ ]\b\b");
          scanf("%d",&code);
          switch(code)
          {
           case 1:
               FIFO();
               break;
           case 2:
            LRU();
             break;
        case 3:
            OPT();
            break;
        case 4:
                        printf("┃谢谢使用页面置换算法演示器! ┃\n");
                        printf("┗━━━━━━━━━━━━━━┛\n");
            exit(0);
                default:
                        printf("输入错误,请重新输入:");
        }
                printf("按任意键重新选择置换算法:>>>");
    }while (code!=4);
}
/*载入数据*/
void download()
{
        int i;
        printf("╔════════════╗\n");
        printf("║正在载入数据,请稍候 !!!║\n");
        printf("╚════════════╝\n");
        printf("Loading...\n");
        printf(" O");
        for(i=0;i<51;i++)
                printf("\b");

        printf("\nFinish.\n载入成功,按任意键进入置换算法选择界面:>>>");
}


void print(unsigned int t)
{
        int i,j,k,l;
        int flag;
        for(k=0;k<=(pSIZE-1)/20;k++)
        {
                for(i=20*k;(i<pSIZE)&&(i<20*(k+1));i++)
                {
                        if(((i+1)%20==0)||(((i+1)%20)&&(i==pSIZE-1)))
                                printf("%d\n",page[i]);
                        else
                                printf("%d   ",page[i]);
                }
                for(j=0;j<mSIZE;j++)
                {
                        for(i=20*k;(i<mSIZE+20*k)&&(i<pSIZE);i++)
                        {
                                if(i>=j)
                                        printf(" |%d|",temp[i][j]);
                                else
                                        printf(" | |");
                        }
                        for(i=mSIZE+20*k;(i<pSIZE)&&(i<20*(k+1));i++)
                        {
                                for(flag=0,l=0;l<mSIZE;l++)
                                        if(temp[i][l]==temp[i-1][l])
                                                flag++;
                               if(flag==mSIZE)/*页面在物理块中*/
                                        printf("    ");
                               else
                                        printf(" |%d|",temp[i][j]);
                        }
                        /*每行显示20个*/
                        if(i%20==0) continue;
                        printf("\n");
                }
        }
        printf("----------------------------------------\n");
        printf("缺页次数:%d\t\t",t+mSIZE);
        printf("缺页率:%d/%d\n",t+mSIZE,pSIZE);
        printf("置换次数:%d\t\t",t);
        printf("访问命中率:%d%%\n",(pSIZE-(t+mSIZE))*100/pSIZE);
        printf("----------------------------------------\n");   
}

/*先进先出页面置换算法*/
void FIFO()
{
    int memery[10]={0};
    int time[10]={0}; /*记录进入物理块的时间*/
    int i,j,k,m;
    int max=0; /*记录换出页*/
    int count=0; /*记录置换次数*/
        /*前mSIZE个数直接放入*/
    for(i=0;i<mSIZE;i++)
    {
        memery[i]=page[i];
        time[i]=i;
        for(j=0;j<mSIZE;j++)
             temp[i][j]=memery[j];
    }
    for(i=mSIZE;i<pSIZE;i++)
    {
                /*判断新页面号是否在物理块中*/
        for(j=0,k=0;j<mSIZE;j++)
        {
            if(memery[j]!=page[i])
                k++;
        }
        if(k==mSIZE) /*如果不在物理块中*/
        {
            count++;
                        /*计算换出页*/
            max=time[0]<time[1]?0:1;
                        for(m=2;m<mSIZE;m++)
                                if(time[m]<time[max])
                                        max=m;
            memery[max]=page[i];
            time[max]=i; /*记录该页进入物理块的时间*/
            for(j=0;j<mSIZE;j++)
                temp[i][j]=memery[j];
        }
        else
        {
            for(j=0;j<mSIZE;j++)
                temp[i][j]=memery[j];
        }
    }     
        print(count);
}
/*最近最久未使用置换算法*/
void LRU()
{
    int memery[10]={0};
    int flag[10]={0}; /*记录页面的访问时间*/
    int i,j,k,m;
    int max=0; /*记录换出页*/
    int count=0; /*记录置换次数*/
        /*前mSIZE个数直接放入*/
    for(i=0;i<mSIZE;i++)
    {
        memery[i]=page[i];
        flag[i]=i;
        for(j=0;j<mSIZE;j++)
             temp[i][j]=memery[j];
    }
    for(i=mSIZE;i<pSIZE;i++)
    {
                /*判断新页面号是否在物理块中*/
        for(j=0,k=0;j<mSIZE;j++)
        {
            if(memery[j]!=page[i])
                k++;
            else
                flag[j]=i; /*刷新该页的访问时间*/
        }
        if(k==mSIZE) /*如果不在物理块中*/
        {
            count++;      /*计算换出页*/
            max=flag[0]<flag[1]?0:1;
                        for(m=2;m<mSIZE;m++)
                                if(flag[m]<flag[max])
                                        max=m;
            memery[max]=page[i];
            flag[max]=i; /*记录该页的访问时间*/
            for(j=0;j<mSIZE;j++)
                  temp[i][j]=memery[j];
        }
        else
        {
            for(j=0;j<mSIZE;j++)
                  temp[i][j]=memery[j];
        }
    }
      
        print(count);
}
/*最佳置换算法*/
void OPT()
{
    int memery[10]={0};
    int next[10]={0}; /*记录下一次访问时间*/
    int i,j,k,l,m;
    int max; /*记录换出页*/
    int count=0; /*记录置换次数*/
        /*前mSIZE个数直接放入*/
    for(i=0;i<mSIZE;i++)
    {
        memery[i]=page[i];
        for(j=0;j<mSIZE;j++)
               temp[i][j]=memery[j];
    }
    for(i=mSIZE;i<pSIZE;i++)
    {
                /*判断新页面号是否在物理块中*/
        for(j=0,k=0;j<mSIZE;j++)
        {
            if(memery[j]!=page[i])
                k++;
        }
        if(k==mSIZE) /*如果不在物理块中*/
        {
                        count++;
                        /*得到物理快中各页下一次访问时间*/
                        for(m=0;m<mSIZE;m++)
                        {
                                for(l=i+1;l<pSIZE;l++)
                                        if(memery[m]==page[l])
                                                break;
                                next[m]=l;
                        }
                        /*计算换出页*/
                        max=next[0]>=next[1]?0:1;
                        for(m=2;m<mSIZE;m++)
                                if(next[m]>next[max])
                                        max=m;
         /*下一次访问时间都为pSIZE,则置换物理块中第一个*/
                        memery[max]=page[i];
                        for(j=0;j<mSIZE;j++)
                                temp[i][j]=memery[j];
        }
        else {
            for(j=0;j<mSIZE;j++)
                   temp[i][j]=memery[j];
        }
    }
      
        print(count);
}
算法该怎么改 才能保证前三个数没有重复
例如输入0107862372 0存储了两遍
搜索更多相关主题的帖子: page printf int for max 
2022-12-08 10:42



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