ALGORITHM:
Step1: start .
Step2: Declare variables.
Step3: Enter total memory size ms.
Step4: Allocate memory for os.
Ms=ms-os
Step5: Read the no partition to be divided n Partition size=ms/n.
Step6: Read the process no and process size.
Step 7: If process size is less than partition size allot else block the process. While allocating update memory wastage-external fragmentation.
if(pn[i]==pn[j])
f=1;
if(f==0)
{
if(ps[i]<=size )
{
extft=extft+size-ps[i];
avail[i]=1;
count++;
}
}Step 8: Print the results
Step 9: Stop.
#include<stdio.h>
#include<conio.h>
void main()
{
int m=0,m1=0,m2=0,p,count=0,i;
clrscr();
printf("enter the memory capacity:");
scanf("%d",&m);
printf("enter the no of processes:");
scanf("%d",&p);
for(i=0;i
{
printf("\nenter memory req for process%d: ",i+1);
scanf("%d",&m1);
count=count+m1;
if(m1<=m)
{
if(count==m)
printf("there is no further memory remaining:");
printf("the memory allocated for process%d is: %d ",i+1,m);
m2=m-m1;
printf("\nremaining memory is: %d",m2);
m=m2;
}
}
else
{
printf("memory is not allocated for process%d",i+1);
}
printf("\nexternal fragmentation for this process is:%d",m2);
}
getch();
}
Input: Enter the memory capacity: 80 Enter no of processes: 2 Enter memory req for process1: 23 The memory allocated for process1 is: 80 Remaining memory is: 57 External fragmentation for this process is: 57 Enter memory req for process2: 52 The memory allocated for process2 is: 57 Remaining memory is: 5 External fragmentation for this process is: 5