we have a direct support for the logarithmic functions in c.
include math.h in your program and this solves the problem of find ln 3..
this ln 3 is similar to log(3);
i think the site mentioned by mahsa_c++ also helps your problem..
please help me in using system(); in c++
System() functions in C or C++ provides you to perform command prompt ( or Shell) command in your program. usually typing the very same command that u do in a shell, in the argument field of the system( ... ) function will lead to the performance of that command.
For example in a cmd ( command prompt ) in windows typing "cls" clears the console. now typing
For Each ctrl As Control In Me.Controls("pnlMainPanel").Controls
If ctrl.GetType Is GetType(System.Windows.Forms.Panel) Then
For Each subCtrl As Control In ctrl.Controls
If subCtrl.GetType Is GetType(System.Windows.Forms.TextBox) Then
If subCtrl.GetType Is ...