#include<stdio.h>
#include<conio.h>
int curr[5][5], maxclaim[5][5], avl[5];
int alloc[5] = {0, 0, 0, 0, 0};
int maxres[5], running[5], safe=0;
int count = 0, i, j, exec, r, p, k = 1;
void main()
{
printf("\nEnter the number of processes: ");
scanf("%d", &p);
for (i = 0; i < p; i++) {
running[i] = 1;
count++;
}
printf("\nEnter the number of resources: ");
scanf("%d", &r);
for (i = 0; i < r; i++) {
printf("\nEnter the resource for instance %d: ", k++);
scanf("%d", &maxres[i]);
}
printf("\nEnter maximum resource table:n");
for (i = 0; i < p; i++) {
for(j = 0; j < r; j++) {
scanf("%d", &maxclaim[i][j]);
}
}
printf("\nEnter allocated resource table: ");
for (i = 0; i < p; i++) {
for(j = 0; j < r; j++) {
scanf("%d", &curr[i][j]);
}
}
printf("\nThe resource of instances: ");
for (i = 0; i < r; i++) {
printf("t%d", maxres[i]);
}
printf("\nThe allocated resource table:n");
for (i = 0; i < p; i++) {
for (j = 0; j < r; j++) {
printf("t%d", curr[i][j]);
}
printf("n");
}
printf("\nThe maximum resource table:n");
for (i = 0; i < p; i++) {
for (j = 0; j < r; j++) {
printf("t%d", maxclaim[i][j]);
}
printf("n");
}
for (i = 0; i < p; i++) {
for (j = 0; j < r; j++) {
alloc[j] += curr[i][j];
}
}
printf("\nAllocated resources:");
for (i = 0; i < r; i++) {
printf("t%d", alloc[i]);
}
for (i = 0; i < r; i++) {
avl[i] = maxres[i] - alloc[i];
}
printf("\nAvailable resources:");
for (i = 0; i < r; i++) {
printf("t%d", avl[i]);
}
printf("n");
while (count != 0) {
safe = 0;
for (i = 0; i < p; i++) {
if (running[i]) {
exec = 1;
for (j = 0; j < r; j++) { if (maxclaim[i][j] - curr[i][j] > avl[j]) {
exec = 0;
break;
}
}
if (exec) {
printf("\nProcess%d is executingn", i + 1);
running[i] = 0;
count--;
safe = 1;
for (j = 0; j < r; j++) {
avl[j] += curr[i][j];
}
break;
}
}
}
if (!safe) {
printf("\nThe processes are in unsafe state.n");
break;
} else {
printf("\nThe process is in safe state");
printf("\nSafe sequence is:");
for (i = 0; i < r; i++) {
printf("t%d", avl[i]);
}
printf("n");
}
getch();
}
}
