I use the while function for iteration but when the process is running can't stop ... please help me ... what should I do?

function [Solution, OverallCost]=VAM(CostsMtx, resources_col, demands_row)

%[CostsMtx,ss,sd]=inputFun(CostsMtx, resources_col, demands_row);

C_start = [464 513 464 513
    352 416 690 352
    995 682 388 388];
C = C_start
[m,n]=size(C)
a = [75
    125
    100
    ]
b = [80 65 70 85]
X = zeros(m,n)

stop = 0;

while stop == 0
    for i = 1:m
        for j = 1:n
            if a(i,1) == 0
                C(i,j) == max(C(:,j))
                if b(1,j) == 0
                    C(i,j) == max(C(i,:))
                end
            end
        end
        C_sort_col = sort(C,1)
        C_sort_row = sort(C,2)
        Diff_customer = abs(C_sort_col(1,:)- C_sort_col(2,:))
        Diff_supplier = abs(C_sort_row(:,1)- C_sort_row(:,2))
        
        for i = 1:m
            if a(i,1) == 0
                Diff_supplier(i,1) = 0
            end
        end
        for j = 1:n
            if b(1,j) == 0
                Diff_customer(1,j) = 0
            end
        end
        Max_Diff_customer = max(Diff_customer)
        Max_Diff_supplier = max(Diff_supplier)
        Customer_nr = find(Diff_customer==max(Max_Diff_customer,Max_Diff_supplier))
        Supplier_nr = find(Diff_supplier==max(Max_Diff_customer,Max_Diff_supplier))
        if isempty(Customer_nr) == 0
            Supplier_nr_ = find(C(:,Customer_nr(1)) == min(C(:,Customer_nr(1))))
            X(Supplier_nr_(1),Customer_nr(1)) = min(a(Supplier_nr_(1),1),b(1,Customer_nr(1)))
            a(Supplier_nr_(1),1) = a(Supplier_nr_(1),1) - X(Supplier_nr_(1),Customer_nr(1))
            b(1,Customer_nr(1)) = b(1,Customer_nr(1)) -  X(Supplier_nr_(1),Customer_nr(1))
            Supplier_nr = []
        end
        if isempty(Supplier_nr) == 0
            Customer_nr_ = find(C(Supplier_nr(1),:) == min(C(Supplier_nr(1),:)));
            X(Supplier_nr(1),Customer_nr_(1)) = min(a(Supplier_nr(1),1),b(1,Customer_nr_(1)));
            a(Supplier_nr(1),1) = a(Supplier_nr(1),1) - X(Supplier_nr(1),Customer_nr_(1));
            b(1,Customer_nr_(1)) = b(1,Customer_nr_(1)) - X(Supplier_nr(1),Customer_nr_(1));
        end
        
        %Stop condition:
        if (max(a)==0||max(b)==0)
            stop = 1;
        end
        a1 = a > 0;
        b1 = b > 0;
        if sum(a1) == 1
            stop = 1;
            for j = 1:n
                if b(j) > 0;
                    X(a1 == 1,j) = b(j);
                end
                
            end
        end
        if sum(b1) == 1
            stop = 1;
            for i = 1:m
                if a(i) > 0;
                    X(i,b1 == 1) = a(i);
                end
                
            end
            
        end
        
    end
    if (isempty(a1) || isempty(b1))
        stop = 1;
    end
    Solution = X;
    OverallCost = sum(sum(C_start .* X));
    a;
    b;
    disp('The Initial Feasible Solution Using Vogels Method');
    disp('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~');
    X
    disp('Initial Cost:');
    OverallCost
    disp('~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~');
end

[David Fletcher]

CTRL+C will stop a script stuck in an infinite loop. If it's in an infinite loop then it is likely the stop condition on your loop is not being met

[Rik]

You're comparing to 0 exactly. It is sometimes possible for a rounding error to occur, so values that look like 0 are actually 1e-16. Did you try comparing to a tolerance instead?

This time I edited your question for you. Next time, please use the tools explained on this page to make your question more readable.

You should also try the debugger first to step through your code. It would also help if you attach a mat file or write some code that would allow us to run your code.

[Muhammad Sam'an]

Yes, i do.. so May I be given an exact suggestion?

[Rik]

What do you mean? We still can't run your code and it is still not clear what you expect and want.