变量未按预期更新

Question

我正试图从样本中找到土地面积百分比最大的县。然后，我尝试打印县和陆地区域的名称“ PERCENTAGE”。

查找土地比例最高的县。

BEGIN { FS="\t"}
BEGIN {mostland = 0} {countyname} {landpercent = $4 /($4+$3)} {if (landpercent > mostland) mostland = landpercent; countyname = $1}
END {if (NR) print countyname " has the largest percentage of land at " mostland "%"}

My test.txt
largest 10000   100 10
medium  5000    50  5
small   1000    25  1

它为“最大”显示正确的百分比。但是它返回“ small”作为县名。

“小土地所占比例最大，为.0909％”

Answer 1

一些包围问题。 BEGIN {}需要在每行之前设置变量。您正在按行重置。另外，您的if ()都需要两个子句中的{}。

尝试一下：

$ awk 'BEGIN { FS="\t"; mostland = 0; countyname = ""} {landpercent = $4 /($4+$3)} {if (landpercent > mostland) {mostland = landpercent; countyname = $1}} END {print countyname " has the largest percentage of land at " mostland "%"}' infile.txt 
largest has the largest percentage of land at 0.0909091%