Untitled

#include <iostream>
#include <vector>
using namespace std;

// Number of processes and resources
const int P = 5;
const int R = 3;

// Class representing the Banker's Algorithm
class BankersAlgorithm {
private:
    vector<int> processes;
    vector<int> available;
    vector<vector<int>> maxm;
    vector<vector<int>> allocation;
    vector<vector<int>> need;

public:
    BankersAlgorithm(vector<int> procs, vector<int> avail,
                     vector<vector<int>> maxMatrix, vector<vector<int>> allocMatrix)
        : processes(procs), available(avail), maxm(maxMatrix), allocation(allocMatrix) {
        need.resize(P, vector<int>(R, 0));
        calculateNeed();
    }

    // Function to calculate the Need matrix
    void calculateNeed() {
        for (int i = 0; i < P; i++) {
            for (int j = 0; j < R; j++) {
                need[i][j] = maxm[i][j] - allocation[i][j];
            }
        }
    }

    // Function to check if the system is in a safe state
    bool isSafe() {
        vector<bool> finish(P, false);
        vector<int> work = available;
        vector<int> safeSeq;

        int count = 0;

        while (count < P) {
            bool found = false;

            for (int i = 0; i < P; i++) {
                if (!finish[i]) {
                    bool canAllocate = true;
                    for (int j = 0; j < R; j++) {
                        if (need[i][j] > work[j]) {
                            canAllocate = false;
                            break;
                        }
                    }

                    if (canAllocate) {
                        for (int k = 0; k < R; k++) {
                            work[k] += allocation[i][k];
                        }
                        safeSeq.push_back(processes[i]);
                        finish[i] = true;
                        found = true;
                        count++;
                    }
                }
            }

            if (!found) {
                cout << "System is not in a safe state" << endl;
                return false;
            }
        }

        cout << "System is in a safe state.\nSafe sequence is: ";
        for (int i : safeSeq) {
            cout << i << " ";
        }
        cout << endl;

        return true;
    }
};

int main() {
    vector<int> processes = {0, 1, 2, 3, 4};
    vector<int> avail = {3, 3, 2};
    vector<vector<int>> maxm = {
        {7, 5, 3},
        {3, 2, 2},
        {9, 0, 2},
        {2, 2, 2},
        {4, 3, 3}};
    vector<vector<int>> allot = {
        {0, 1, 0},
        {2, 0, 0},
        {3, 0, 2},
        {2, 1, 1},
        {0, 0, 2}};

    BankersAlgorithm banker(processes, avail, maxm, allot);
    banker.isSafe();

    return 0;
}