批处理文件在字符串中查找子字符串

Question

我正在尝试创建一个函数，用于在另一个字符串中查找一个字符子字符串。我不能让它工作。 (SET "_gf=!_strif!:~!_cf!,1) 线路不工作。

注意：下面写的函数是工作修正版：

@ECHO off
setlocal enabledelayedexpansion

SET "_stri=abcdefghij"
SET "_strf=c"
SET "_s=0"
CALL :instr %_stri%, %_strf%, %_s%
echo Found at %_result%. position >> fun.txt
goto :eof

:instr
SETLOCAL
SET "_strif=%1"
SET "_strff=%2"
SET "_sf=%3"
SET "_cf="
SET "_gf="
FOR /L %%a IN (%_sf%,1,10) DO (
    SET "_cf=%%a"
    SET "_gf=!_strif:~%%a,1!"
    IF "!_gf!"=="!_strff!" GOTO ENDF
)
:ENDF
ENDLOCAL & SET "_result=%_cf%"

Answer 1

SET "_gf=!_strif!:~!_cf!,1
         ^......^  ^...^    Variable start and end as seen by the parser

更好用

SET "_gf=!_strif:~%%a,1!"

批处理文件在字符串中查找子字符串

Batch file finding a substring in a string

string

substring

function

batch-file

find