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Need to calculate when adding coin

You are adding strings rather than numbers. You'll need to convert your strings into numbers to add them together, and you shouldn't clear your results first.

For example:

private void fiveP_Click(object sender,
EventArgs e)
            // balance.Clear();    <- You don't
need this.
            balance.Text = ((double)balance.Text +

Categories : C#

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PHP/MySQL - Calculate Profit by Adding Up Sales and Purchases then Subtracting
You can't use alias in the same select where they are defined. Instead, use conditional aggregation for all three: SELECT SUM(case when salesOrPurchase = 's' then amount end) as SalesTotal, SUM(case when salesOrPurchase = 'p' then amount end) as PurchasesTotal, SUM(case when salesOrPurchase = 's' then amount when salesOrPurchase = 'p' then - amount end)

Categories : PHP
Automatic adding the common part to function of a class without explicitly adding those to every function
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Categories : Java
How to use the Computed Value to calculate another
You have to repeat the expression Select cost , (service_charge*(cost-Discount)) as service_charge , (service_tax*(cost-Discount+((service_charge*(cost-Discount))*(cost-Discount)))) as service_tax From VENDOR_ITEMS WHERE vendor_items_id = 264

Categories : Mysql
Calculate y derivative of image
I think you would probably need to check out what Sobel operator does here:

Categories : C++
loop to calculate timestamps
You can reset the seconds and minutes at the end of each loop : int m = minute; int s = second; for (int i = hour; i < 24; i++) { for (int j = m; j < 60; j++) { for (int k = s; k < 60; k++) { .... } s = 0; } m = 0; }

Categories : Java
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