Write a program to implement the Dynamic allocation of memories in Multiprogram Variable Task.

Write a program to implement the Dynamic allocation of memories in Multiprogram Variable Task.

Algorithm for Multiprogram Variable Task:

Step1: start the process.

Step2: Declare variables.

Step3: Enter total memory size.

Step4: Allocate memory for the OS.

Step5: allocate total memory to the pages.

Step6: Display the wastage of memory.

Step7: Stop the process.

/* Program to simulate the MVT */

Program Code:

#include<stdio.h>

#include<conio.h>

void main()

{

int m,i,p[15];

char ch;

clrscr();

printf("Enter memory to be allocated: ");

scanf("%d",&m);

printf("Enter process size : ");

scanf("%d", &p[0]);

i=0;

do

{

m=m-p[i];

printf("\nRemaining memory is %d\n",m);

abc:printf("Do you want to continue: ");

fflush(stdin);

scanf("%c",&ch);

i++;

if(ch=='y')

{

printf("Enter the process size: ");

scanf("%d",&p[i]);

}

else

{

printf("\nExternal fragmentation is %d",m);

break;

}

if(m<p[i])

{

printf("\nRequired memory is not available\n");

goto abc;

}

}while((ch=='y')&&(m>=p[i]));

getch();

}

Program Output:

Enter memory to be allocated: 1000

Enter process size : 500

Remaining memory is 500

Do you want to continue: y

Enter the process size: 300

Remaining memory is 200

Do you want to continue: y

Enter the process size: 100

Remaining memory is 100

Do you want to continue: n

External fragmentation is 100