如何使用awk为每一行使用值的总和

我有一个小的txt文件：

Josh 10
Bill 10
Samanda 30

所有NUM的总和为50。 如何使用此总和分割每行上的值

0.2 # 10/50
0.2 # 10/50
0.6 # 30/50

我的awk脚本无法按预期工作：

BEGIN {
sum += $2;
}
{
print $2/sum
}

它返回0。

在打开任何输入文件之前，BEGIN为true，这就是为什么脚本中的sum+=$2除了将sum设置为零之外什么都不做

如果sum为零，三元函数可以防止被零除。

在打开任何输入文件之前，BEGIN为true，这就是为什么脚本中的sum+=$2除了将sum设置为零外，什么都不做

---

如果和为零，三元是为了防止被零除。

请您尝试以下内容，并用GNU awk中显示的样本编写和测试

说明：增加对以上内容的详细说明

awk '                            ##Starting awk program from here.
{
  val[NR]=$2                     ##Creating array val whose index is  current line number and value is 2nd field of current line.
  sum+=$2                        ##Creating sum which has 2nd column value in it which is keep on getting added in it.
}
END{                             ##Starting END block of this code here.
  for(i=1;i<=NR;i++){            ##Starting a for loop from i 1 to till value of count here.
    print sum?val[i]/sum:0       ##Printing val[i]/sum value here if sum is NOT NULL else printing 0 here.
  }
}
' Input_file                     ##Mentioning Input_file name here.

---

请您尝试以下，书面和测试显示的样本在GNU awk

说明：增加对以上内容的详细说明

awk '                            ##Starting awk program from here.
{
  val[NR]=$2                     ##Creating array val whose index is  current line number and value is 2nd field of current line.
  sum+=$2                        ##Creating sum which has 2nd column value in it which is keep on getting added in it.
}
END{                             ##Starting END block of this code here.
  for(i=1;i<=NR;i++){            ##Starting a for loop from i 1 to till value of count here.
    print sum?val[i]/sum:0       ##Printing val[i]/sum value here if sum is NOT NULL else printing 0 here.
  }
}
' Input_file                     ##Mentioning Input_file name here.

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awk '                            ##Starting awk program from here.
{
  val[NR]=$2                     ##Creating array val whose index is  current line number and value is 2nd field of current line.
  sum+=$2                        ##Creating sum which has 2nd column value in it which is keep on getting added in it.
}
END{                             ##Starting END block of this code here.
  for(i=1;i<=NR;i++){            ##Starting a for loop from i 1 to till value of count here.
    print sum?val[i]/sum:0       ##Printing val[i]/sum value here if sum is NOT NULL else printing 0 here.
  }
}
' Input_file                     ##Mentioning Input_file name here.