Can u explain this code in detail. I will Upvote :
Can u explain this code in detail. I will Upvote :
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
struct MainMem
{
int start_add;
int pn;
};
int main()
{
int s,i,totPages,pno,offset,n,r,arr[200]={0},phy_add,fno[100];
struct MainMem mm[100];
srand((unsigned)time(NULL));
printf("Logical Address To Physical Address\n");
printf("Enter the Size of File : ");
scanf("%d",&n);
printf("Enter the Page Size : ");
scanf("%d",&s);
totPages=n/s;
for(i=0;i<totPages;i++)
{
r=rand()%totPages;
if(arr[r] == 1)
{
i--;
continue;
}
arr[r]=1;
mm[i].pn=r;
mm[i].start_add=i*s;
fno[r]=i;
}
printf("\n*************\n");
printf("The Structure of Main Memory\n");
printf("***********\n");
printf("Frame\tPage\nNumber\tNumber\n------\t------\n");
for(i=0; i < totPages; i++)
{
printf("%d\t%d\n",i,mm[i].pn);
}
printf("***********\n");
printf("Enter The Logical Address\nPage Number : ");
scanf("%d",&pno);
printf("Offset : ");
scanf("%d",&offset);
if(pno >= totPages || offset > s)
{
printf("Invalid Input\n");
return 0;
}
phy_add = mm[fno[pno]].start_add + offset;
printf("***********\n");
printf("Physical Address : %d\n",phy_add);
printf("***********\n");
return 0;
}
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