tailieunhanh - Excel add in development in c and c phần 2

Một lựa chọn khác là đi qua một con đường mà bao gồm các ngành mà chưa được đi qua để thực hiện logic không đo lường unexercised. Nó có thể được mong muốn để lây lan ra các traversals, lựa chọn con đường khác nhau mỗi lần | Excel Functionality 23 occupied by the TABLE function you can t set up a table other than with the Data Table wizard. The best way to think of a Data Table is as a completely different type of object that allows a complex set of calculations in the worksheet to be treated as a user-defined function in this very specific way. An example of where use of a Data Table might be preferable to writing a VB or C C function might be the calculation of net income after tax. This depends on many pieces of information such as gross income tax allowances taxation bands marital status etc. Coding all this into a user-defined function may be difficult take an unjustifiably long time involve the passing of a large number of arguments and might be hard to debug. A well laid-out spreadsheet calculation complete with descriptive labels for the inputs and a Data Table provide an excellent way of creating a source for a lookup function. One thing to watch is that Excel does not detect circular references resulting from the input calculation depending on the table itself. In other words it will allow them. Every time the table is recalculated the circular reference will feed back one more time. There s no reason someone in their right mind would want to do this of course but be warned. Warning Data Tables can recalculate much more slowly than repeated calculation of cells. Excel s recalculation logic can also be a little hard to fathom with large Data Tables - it s not always clear when the calculation is complete. Goal Seek and Solver Add-in Excel provides two ways of solving for particular static cell values that produce a certain value in another cell. These are both commands not functions so you cannot automatically re-solve when something in your sheet changes. To achieve this you would need to write a user-defined function that will implement some kind of solver. The simplest of Excel s solvers is the Goal Seek Tools Goal seek. which invokes the following dialog and .