vb.net - randomising operators visual basic -

i want program (visual basic) randomly select times (*) or divide (/) , used operator in equation later in program. haven't started declaration of variables. thanks.

you didn't provide code there can many solutions. have 2 operators, think best way go use conditions. basics use random class, , if or case.

the code can this:

function dosomeoperation(byval double, byval b double, optional byref op string = "") double     dim rnd new random()     select case rnd.next(0, 2)         case 1             op = "/"             return / b         case else             op = "*"             return * b     end select end function 

this code return operation result, , optionally operation used in op parameter. rnd.next(0, 2) statement returns either 0 or 1 (because maxvalue 2, exclusive upper bound).

*in real life should check result doesn't exceed double limits, , try..catch.

example of function use in console app:

    dim double = 8     dim b double = 2     dim op string = ""     dim result double = dosomeoperation(a, b, op)     console.writeline(string.format("{0} {1} {2} = {3}", a, op, b, result))     console.readkey()     'output: 8 * 2 = 16 or 8 / 2 = 4 

addition

to answer @wickedjdg comment, if want a , b randomly selected between 1 , 12, can use function:

function dosomerandomoperation(optional byref double = 0, optional byref b double = 0, optional byref op string = "") double     dim rnd new random()     = rnd.next(1, 13)     b = rnd.next(1, 13)     select case rnd.next(0, 2)         case 1             op = "/"             return / b         case else             op = "*"             return * b     end select end function