Multiple Instance

#include<stdio.h>

#include<conio.h>

void
main()

{

int ra[10],rb[10],rc[10],aa[10],ab[10],ac[10],na[10],nb[10],nc[10];

int n,i,a,b,c,t=0,x,y,z,f[10]={0};

char ch;

clrscr();

printf("\n\n\t\tMULTIPLE
INSTANCE");

printf("\n\t\t~~~~~~~~
~~~~~~~~");

printf("\nEnter
the No. of Process:");

scanf("%d",&n);

for(i=1;i<=n;i++)

{

printf("\n\tProcess
P%d:",i);

printf("\nEnter
the No. of Maximum Resources in type A:");

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

printf("\nEnter
the No. of Maximum Resources in type B:");

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

printf("\nEnter
the No. of Maximum Resources in type C:");

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

do

{

printf("\nEnter
the No. of Allocation Type A:(<=%d):",ra[i]);

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

}while(aa[i]>ra[i]);

do

{

printf("\nEnter
the No. of Allocation Type B:(<=%d):",rb[i]);

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

}while(ab[i]>rb[i]);

do

{

printf("\nEnter
the No. of Allocation Type C:(<=%d):",rc[i]);

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

}while(ac[i]>rc[i]);

}

printf("\n\nEnter
the number of Resources Available in A:");

scanf("%d",&a);

printf("\n\nEnter
the number of Resources Available in B:");

scanf("%d",&b);

printf("\n\nEnter
the number of Resources Available in C:");

scanf("%d",&c);

do

{

printf("\n\nProcess\t Request\tallocation\tResource Need\tavilable");

printf("\n~~~~~~~\t ~~~~~~~\t~~~~~~~~~~~\t~~~~~~~~~~~~\t~~~~~~~~~");

for(i=1;i<=n;i++)

{

na[i]=ra[i]-aa[i];

nb[i]=rb[i]-ab[i];

nc[i]=rc[i]-ac[i];

printf("\nP%d\t %d
%d %d\t%d
%d %d\t\t%d
%d %d",

i,ra[i],rb[i],rc[i],aa[i],ab[i],ac[i],na[i],nb[i],nc[i]);

if(i==1)

printf("\t\t%d %d
%d",a,b,c);

}

for(i=1;i<=n;i++)

f[i]=0;

i=1;x=a;y=b;z=c;t=0;

while(i<=n)

{

if((f[i]==0)&&(na[i]<=x)&&(nb[i]<=y)&&(nc[i]<=z))

{

x=x+aa[i];

y=y+ab[i];

z=z+ac[i];

f[i]=1;

t++;

i=1;

}

else

i++;

}

if(t==n)

printf("\n\n\t\tThe
System is in safe state");

else

{

printf("\n\n\t\t
The System is in Unsafe state");

exit();

}

printf("\n\n\tAdditional
Resources Allocation");

printf("\n\t~~~~~~~~~~
~~~~~~~~~ ~~~~~~~~~~");

printf("\nEnter
the Process No.:");

scanf("%d",&t);

printf("\n\tIn
Process P%d:",t);

printf("\nEnter
the No. of Additional Resources in type A:");

scanf("%d",&x);

printf("\nEnter
the No. of Additional Resources in type B:");

scanf("%d",&y);

printf("\nEnter
the No. of Additional Resources in type C:");

scanf("%d",&z);

if((x<=a)&&(y<=b)&&(z<=c))

printf("\n\n\tThe
Request accepted\n\tThe resourcess are granted immediatley");

else

printf("\n\n\tThe
Request is NOT accepted");

fflush(stdin);

printf("\n\n\t\tDo
you continue(Y/N):");

scanf("%c",&ch);

}while((ch=='y')(ch=='Y'));

}

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