Tcl 如何使用foreach循环逐个读取两个文件的内容?
我的TCL脚本:Tcl 如何使用foreach循环逐个读取两个文件的内容?,tcl,expect,Tcl,Expect,我的TCL脚本: set a [open fruits.txt r] set b [read $a] foreach c $b { puts "Fruits : $c" set website [open website_name1.txt r] set each_one [read $website] foreach each $each_one { puts "website name : $c" } } fruits.txt内
set a [open fruits.txt r]
set b [read $a]
foreach c $b {
puts "Fruits : $c"
set website [open website_name1.txt r]
set each_one [read $website]
foreach each $each_one {
puts "website name : $c"
}
}
fruits.txt
内容:
apple orange mango litchi banana
google.com yahoo.com metlife.com cisco.com span.com
网站\u name1.txt
内容:
apple orange mango litchi banana
google.com yahoo.com metlife.com cisco.com span.com
现在,如果我运行上述脚本,我将获得如下所示的输出:
D:\Desktop>tclsh statck_qns.tcl
Fruits : apple
website name : apple
website name : apple
website name : apple
website name : apple
website name : apple
Fruits : orange
website name : orange
website name : orange
website name : orange
website name : orange
website name : orange
Fruits : mango
website name : mango
website name : mango
website name : mango
website name : mango
website name : mango
Fruits : litchi
website name : litchi
website name : litchi
website name : litchi
website name : litchi
website name : litchi
Fruits : banana
website name : banana
website name : banana
website name : banana
website name : banana
website name : banana
D:\Desktop>
Fruits : apple
website name : google.com
Fruits : orange
website name : yahoo.com
Fruits : mango
website name : metlife.com
Fruits : litchi
website name : cisco.com
Fruits : banana
website name : span.com
但我试图获得如下所示的输出:
D:\Desktop>tclsh statck_qns.tcl
Fruits : apple
website name : apple
website name : apple
website name : apple
website name : apple
website name : apple
Fruits : orange
website name : orange
website name : orange
website name : orange
website name : orange
website name : orange
Fruits : mango
website name : mango
website name : mango
website name : mango
website name : mango
website name : mango
Fruits : litchi
website name : litchi
website name : litchi
website name : litchi
website name : litchi
website name : litchi
Fruits : banana
website name : banana
website name : banana
website name : banana
website name : banana
website name : banana
D:\Desktop>
Fruits : apple
website name : google.com
Fruits : orange
website name : yahoo.com
Fruits : mango
website name : metlife.com
Fruits : litchi
website name : cisco.com
Fruits : banana
website name : span.com
您的代码存在许多问题。您在第二个循环中使用的是
$c
,而它应该是$each
。此外,如果您只想将网站名称放置一次,则需要获得一个同时在两个列表中循环的循环
set a [open fruits.txt r]
set b [read $a]
set website [open website_name1.txt r]
set each_one [read $website]
foreach c $b each $each_one {
puts "Fruits : $c"
puts "website name : $each"
}
close $a
close $website
您可以使用上述格式的foreach
循环浏览两个(或更多)列表,即:
foreach var1 list1 var2 list2 ... varn listn {
# code here
}
如果列表中的元素数量不相同,那么您将开始在列表的变量名中获得元素数量较少的空字符串。也可以使用while循环逐行读取
set f_fruit [open fruits.txt r]
set f_web [open website_name1.txt r]
while {[gets $f_fruit fruit] != -1 && [gets $f_web website] != -1} {
puts "Fruits: $fruit"
puts "website name: $website"
}
close $f_fruit
close $f_web
请注意,这种方法循环使用文件中的单词,而不是行。如果您在fruits.txt中有“granny smith apple”,那么您的输出可能不是您所期望的。