新手问题整数相除问题

pestd · April 22, 2015 · Last by ywjno replied at April 22, 2015 · 1958 hits

saledata.vips_num / saledata.visitors_num

结果是 60 / 100，输出 0，期望是 0.6

libuchao #1 April 22, 2015

60 / 100.0

saledata.vips_num / saledata.visitors_num.to_f

ryan #2 April 22, 2015

整数相除是向下取整。你需要转换成浮点数运算

pestd #3 April 22, 2015

@libuchao saledata.vips_num.to_f / saledata.visitors_num 这样貌似不行

ywjno #4 April 22, 2015

[5] pry(main)> (BigDecimal.new(60)/BigDecimal.new(100)).to_s
=> "0.6"

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新手问题 整数相除问题