问题
I want to calculate a percentage. My code is:
Bot.Log("[ KEYBOT ] The total is " + (suctrades * totaltrades ) / 100 + "% !");
If I do this, I only get 0. What am I doing wrong?
回答1:
Probably suctrades * totaltrades is still an int. The easiest way will be probably changing your code to:
((double)suctrades) * totaltrades/100
Or
suctrades * totaltrades/100.0
To force using double instead of int
回答2:
Try :
Bot.Log("[ KEYBOT ] The total is " + ((double)suctrades * totaltrades ) / 100 + "% !");
I assume suctrades and totaltrades are not of decimal type. This should fix this due to type propagation as expression is evaluated.
回答3:
Int is an integer type; dividing two ints performs an integer division, i.e. the fractional part is truncated since it can't be stored in the result type (also int!). Decimal, by contrast, has got a fractional part. By invoking Decimal.Divide, your int arguments get implicitly converted to Decimals.
You can enforce non-integer division on int arguments by explicitly casting at least one of the arguments to a floating-point type, e.g.: 100.0m this is casting to decimal !
decimal result = suctrades * totaltrades/100.0m
来源：https://stackoverflow.com/questions/27191908/how-to-calculate-a-percentage