WHY IS THIS NOT WORKING

[tblade10]

I do not understand why this is nto working, it runs but every time you do subtraction it just spits out the first number you type in.

 #include <iostream>

using namespace std;


    int main()
    {
        char a;



        int value = 1;
        int x;
        int sum;

        sum = 0;

        cout << "a: Addition \nb: Subtraction" << endl;
        cin >> a;

        if(a == 'a'){
            cout << "enter 5 digits" << endl;
        while (value <= 5){
            cin >> x;
            sum = x + sum;
            value = value ++;
        }
            cout << "Your answer is " << sum;
        }
        int subtractiona;
        int subtractionb;
        int difference;


        if(a == 'b'){
            cout << "enter 5 digits" << endl;
            cin >> subtractiona;

        while (value <= 4){
            cin >> subtractionb;
            difference = subtractiona - subtractionb;
            difference = subtractiona;
            value++;
        }
            cout << "Your answer is " << ;

        }





    return 0;
    }

I have no clue why this isnt working and im really irritated

[rjvc]

hi! The question is redundant with the previous post you made. It would be better to delete this one for double posting the same problem. Thank you. :)