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bank.c
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bank.c
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#include<stdio.h>
int main() {
int allocation[10][5],max[10][5],need[10][5],available[3],flag[10],sq[10];
int n,r,i,j,k,count,count1=0;
printf("\n Input the number of processes running ");
scanf("%d",&n);
for(i=0;i<10;i++)
flag[i]=0;
printf("\n Input the number of resources ");
scanf("%d",&r);
printf("\n Input the allocation matrix for the processes in row major order..\n");
for(i=0;i<n;i++)
{
printf("\n Process %d\n",i);
for(j=0;j<r;j++)
{
printf("\n Resource %d\n",j);
scanf("%d",&allocation[i][j]);
}
}
printf("\n Input the no. of resources that a process can maximum have..\n");
for(i=0;i<n;i++)
{
printf("\n Process %d\n",i);
for(j=0;j<r;j++)
{
printf("\n Resource %d\n",j);
scanf("%d",&max[i][j]);
}
}
printf("\n Input the no. of available instances of each resource..\n");
for(i=0;i<r;i++)
{
printf("\n Resource %d : ",i);
scanf("%d",&available[i]);
}
printf("\n The need matrix is as follows : \n");
for(i=0;i<n;i++)
{
for(j=0;j<r;j++)
{
need[i][j]= max[i][j]-allocation[i][j];
if(need[i][j] < 0) {
}
else {
printf("\t %d",need[i][j]);
}
}
printf("\n");
}
do{
for(k=0;k<n;k++)
{
for(i=0;i<n;i++)
{
if(flag[i]==0)
{
count=0;
for(j=0;j<r;j++)
{
if(available[j]>=need[i][j])
count++;
}
if(count==r)
{
count1++;
flag[i]=1;
sq[count1-1]=i;
for(j=0;j<r;j++)
{
available[j]=available[j]+allocation[i][j];
}
break;
}
}
}
}
if(count1!=n)
{
printf("\n---------------IT'S AN UNSAFE STATE---------------");
break;
}
}while(count1!=n);
if(count1==n)
{
printf("\n *******************IT'S A SAFE STATE*******************");
printf("\n The safe sequence is....\n");
for(i=0;i<n;i++)
printf("\t P%d",sq[i]);
printf("\n");
printf("\n The available matrix is now : ");
for(i=0;i<r;i++)
printf("\t %d",available[i]);
}
}