bat脚本计算前一天的日期

你好，我可以回答这个问题。可以使用以下代码计算前一天的日期：

@echo off
setlocal enabledelayedexpansion

set "today=!date!"
set /a "day=1%today:~0,2%-100, month=1%today:~3,2%-100, year=today:~6,4%"
set /a "day-=1"
if !day! == 0 (
    set /a "month-=1"
    if !month! == 0 (
        set /a "year-=1"
        set "month=12"
    )
    set /a "day=31"
    if !month! == 4 (
        set /a "leap=year%%4"
        if !leap! == 0 set /a "day=30"
    )
    if !month! == 6 (
        set /a "day=30"
    )
    if !month! == 9 (
        set /a "day=30"
    )
    if !month! == 11 (
        set /a "day=30"
    )
    if !month! == 2 (
        set /a "leap=year%%4"
        if !leap! == 0 set /a "day=29"
        if !leap! neq 0 set /a "day=28"
    )
)
set "month=0!month!"
set "day=0!day!"
set "year=!year:~-4!"
set "yesterday=!year!!month:~-2!!day:~-2!"

echo Yesterday's date is %yesterday%.

希望能帮到你。