1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138

#include<stdio.h>
#include<stdlib.h>

void FIFO(char [ ],char [ ],int,int);
void lru(char [ ],char [ ],int,int);
void opt(char [ ],char [ ],int,int);

int main()
{
    int ch,YN=1,i,l,f;
    char F[10],s[25];
    printf("\nEnter the no of empty frames: ");
    scanf("%d",&f);
    printf("\nEnter the length of the string: ");
    scanf("%d",&l);
    printf("\nEnter the string: ");
    scanf("%s",s);
    for(i=0;i<f;i++)
        F[i]=-1;

    do
    {
        printf("\n*********** MENU ***********");
        printf("\n1:FIFO\n2:LRU \n3:EXIT");
        printf("\nEnter your choice: ");
        scanf("%d",&ch);

        switch(ch)
        {
            case 1: for(i=0;i<f;i++)
                        F[i]=-1;
                    FIFO(s,F,l,f);
                    break;

            case 2: for(i=0;i<f;i++)
                        F[i]=-1;
                    lru(s,F,l,f);
                    break;

            case 3: exit(0);
        }
        printf("\n\nDo u want to continue IF YES PRESS 1\nIF NO PRESS 0 : ");
        scanf("%d",&YN);
    } while(YN==1);
    return(0);
}

//FIFO
void FIFO(char s[],char F[],int l,int f)
{
    int i,j=0,k,flag=0,cnt=0;
    printf("\n\tPAGE\t	FRAMES\t\t\t FAULTS");
    for(i=0;i<l;i++)
    {
        for(k=0;k<f;k++)
        {
            if(F[k]==s[i])
                flag=1;
        }

        if(flag==0)
        {
            printf("\n\t%c\t",s[i]);
            F[j]=s[i];
            j++;
            for(k=0;k<f;k++)
                printf("	%c",F[k]);
            printf("\tPage-fault%d",cnt);
            cnt++;
        }

        else
        {
            flag=0;
            printf("\n\t%c\t",s[i]);
            for(k=0;k<f;k++)
                printf("	%c",F[k]);
            printf("\tNo page-fault");
        }
        if(j==f)
            j=0;
    }
}

//LRU
void lru(char s[],char F[],int l,int f)
{
    int i,j=0,k,m,flag=0,cnt=0,top=0;
    printf("\n\tPAGE\t	FRAMES\t\t\t FAULTS");
    for(i=0;i<l;i++)
    {
        for(k=0;k<f;k++)
        {
            if(F[k]==s[i])
            {
                flag=1;
                break;
            }
        }
        printf("\n\t%c\t",s[i]);
        if(j!=f && flag!=1)
        {
            F[top]=s[i];
            j++;
            if(j!=f)
                top++;
        }

        else
        {
            if(flag!=1)
            {
                for(k=0;k<top;k++)
                    F[k]=F[k+1];
                F[top]=s[i];
            }

            if(flag==1)
            {
                for(m=k;m<top;m++)
                    F[m]=F[m+1];
                F[top]=s[i];
            }
        }

        for(k=0;k<f;k++)
            printf("	%c",F[k]);

        if(flag==0)
        {
            printf("\tPage-fault%d",cnt);
            cnt++;
        }
        else
            printf("\tNo page fault");
        flag=0;
    }
}