替换字符串中的字符

Question

I am trying to replace all instances of a character in a string of text with another character but I'm not succeeding.

Suppose the text is

cat rat mat fat

I want the script to replace all the t's to p's

cap rap map fap

What I have is the following but it seems to do little for me.

SET /P MY_TEXT=ENTER TEXT:

SET T2P=P

SET NEW_TEXT=%TEXT=:T!T2P!%

MSG * %NEW_TEXT%

Answer 1

Try this

setlocal 
set string=cat rat mat fat
set string=%string:t=p%

Answer 2

You've got the = sign in the wrong place. Try:

setlocal enabledelayedexpansion
set /P MY_TEXT=ENTER TEXT:
SET T2P=P
set NEW_TEXT=%MY_TEXT:T=!T2P!%
MSG * %NEW_TEXT%

You can also do the expansion the other way round, ie

set NEW_TEXT=!MY_TEXT:T=%T2P%!

Answer 3

您可以像这样使用'sed'：

echo "cat rat mat fat" | sed 's/t/p/g'  # outputs "cap rap map fap"