MVT

AIM: The main of this program is to implement the Multi programming with a Variable number of Tasks in c

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

int  ms,mp[10],i, temp,n=0;

char ch = 'y';

clrscr();

printf("\nEnter the total memory available (in Bytes)-- ");

scanf("%d",&ms);

temp=ms;

for(i=0;ch=='y';i++,n++)

{

printf("\nEnter memory required for process %d (in Bytes) -- ",i+1);

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

if(mp[i]<=temp)

{

printf("\nMemory is allocated for Process %d ",i+1);

temp = temp - mp[i];

}

else

{

printf("\nMemory is Full");

break;

}

printf("\nDo you want to continue(y/n) -- ");

scanf(" %c", &ch);

}

printf("\n\nTotal Memory Available -- %d", ms);

printf("\n\n\tPROCESS\t\t MEMORY ALLOCATED ");

for(i=0;i<n;i++)

printf("\n \t%d\t\t%d",i+1,mp[i]);

printf("\n\nTotal Memory Allocated is %d",ms-temp);

printf("\nTotal External Fragmentation is %d",temp);

getch();

}                     

Input:                                

Enter the total memory available (in Bytes)               --          1000

Enter memory required for process 1 (in Bytes)         --          400

Memory is allocated for Process 1                 

Do you want to continue(y/n)                                     --          y         

Enter memory required for process 2 (in Bytes)         --          275

Memory is allocated for Process 2                 

Do you want to continue(y/n)                                     --          y         

Enter memory required for process 3 (in Bytes)         --          550

 Output:                                

Memory is Full                                   

Total Memory Available -- 1000                    

PROCESS      MEMORY ALLOCATED   

1                           400                 

2                           275                 

Total Memory Allocated is 675                     

Total External Fragmentation is 325  

 Result: