如何让 bash 变量根据时间在单数和复数结尾之间更改单词？

Question

我还不是一个好的 bash 脚本编写者。

在下面的示例脚本中，我试图通过步骤移动，检查自步骤开始以来经过的时间量，并使用正确的单数或复数结尾来描述已经过去的时间量。

如果经过的时间四舍五入为 1 秒，我希望脚本告诉我完成该步骤需要 1 "second"，如果除了 1 秒之外还有其他任何时间，我想让它告诉我它花了 x 数量 "seconds"

#!\bin\bash
STEP=0
STEPS=4
RUN=1

while [ $RUN -eq 1 ]
do
    if (( RUNTIME == 1 ))
    then
      SEC="second"
    else
      SEC="seconds"
    fi


    STEP=$(( STEP + 1 ))
    printf "\nStep $STEP/$STEPS\n"
    printf "Hi!\n"
    TIME=$SECONDS
    RUNTIME=$(( TIME - START_TIME ))
    printf "That took $RUNTIME $SEC\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 1s
    TIME1=$SECONDS
    RUNTIME=$(( TIME1 - TIME ))
    printf "That took $RUNTIME $SEC\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 2s
    TIME2=$SECONDS
    RUNTIME=$(( TIME2 - TIME1 ))
    printf "That took $RUNTIME $SEC\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 3s
    TIME3=$SECONDS
    RUNTIME=$(( TIME3 - TIME2 ))
    printf "That took $RUNTIME $SEC\n\n"

    END_TIME=$SECONDS
    RUNTIME=$(( END_TIME - START_TIME ))
    printf "The script took $RUNTIME $SEC to complete.\n\n"

    RUN=0

done

Answer 1

David，如果您还没有找到问题，那更多的是 chicken-or-egg 问题。这意味着您要根据循环开始处 RUNTIME 的值设置 SEC，而不是紧接循环之前 RUNTIME 的当前值输出。一个更好的处理方法，而不是在循环的顶部计算 SEC，只是编写一个小函数，根据 [=] 的值输出 "second" 或 "seconds" 13=] 并将其合并到您的 printf 中（如果您不在 WSL 上，则不应在 格式字符串 中包含双 \ - 尽管从您的使用其中，看起来你是）

你可以做一些简单的事情，比如：

#!/bin/bash

STEP=0
STEPS=4
RUN=1

secorsecs () {              ## simple sec or secs function based on $RUNTIME
    local seconds="second"  ## your base output is "second"
    if (( RUNTIME != 1 ))   ## if RUNTIME != 1
    then
        seconds+="s"        ## append an "s" to the end
    fi
    printf "%s" "$seconds"  ## output result
}

while [ $RUN -eq 1 ]
do
    STEP=$(( STEP + 1 ))
    printf "\nStep $STEP/$STEPS\n"
    printf "Hi!\n"
    TIME=$SECONDS
    RUNTIME=$(( TIME - START_TIME ))
    printf "That took $RUNTIME $(secorsecs)\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 1s
    TIME1=$SECONDS
    RUNTIME=$(( TIME1 - TIME ))
    printf "That took $RUNTIME $(secorsecs)\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 2s
    TIME2=$SECONDS
    RUNTIME=$(( TIME2 - TIME1 ))
    printf "That took $RUNTIME $(secorsecs)\n\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\n"
    printf "Hi!\n"
    sleep 3s
    TIME3=$SECONDS
    RUNTIME=$(( TIME3 - TIME2 ))
    printf "That took $RUNTIME $(secorsecs)\n\n"

    END_TIME=$SECONDS
    RUNTIME=$(( END_TIME - START_TIME ))
    printf "The script took $RUNTIME $(secorsecs) to complete.\n\n"

    RUN=0

done

例子Use/Output

$ bash seconds.sh

Step 1/4
Hi!
That took 0 seconds

Step 2/4
Hi!
That took 1 second

Step 3/4
Hi!
That took 2 seconds

Step 4/4
Hi!
That took 3 seconds

The script took 6 seconds to complete.

检查一下，如果您还有其他问题，请告诉我。

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