Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
449 views
in Technique[技术] by (71.8m points)

double - Why returns C# Convert.ToDouble(5/100) 0.0 and not 0.05

double variable = Convert.ToDouble(5/100);

Will return 0.0 but i expected 0.05

What can / must i change to get 0.05

because the 5 in this example is a variable

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

5/100 is done in integer arithmetic, which yields 0 before conversion. Try

double variable = 5.0/100;

If 5 is in a variable x (of integer type), then use:

variable = (double)x/100; 

or

variable = ((double)x)/100;

to make the intent clear (thanks John!)

or

variable = x/100.0;

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...