If Perl is installed, this command will display the version number. If Perl is not installed, you can install it using the package manager of your Linux distribution. For example, on Ubuntu, you can use the following command to install Perl: “` sudo apt-get install perl “` 2. Running...
print "\n###Assigning input to an array beginning!!!\n"; print "Tell me everthing about yourself. \n"; @all=<STDIN>; print "your input are displayed: \n@all"; print "The number of elements in the array are: ", $#all + 1, " \n"; print "The first element of the array is...
#!/usr/bin/perl # Function definition sub Average { # get total number of arguments passed. $n = scalar(@_); $sum = 0; foreach $item (@_) { $sum += $item; } $average = $sum/$n; print "Average for the given numbers : $average\n"; } # Function call Average(10, 20, 3...
@subarray = @array[0,1]; # @subarray = (1, 2) @subarray2 = @array[1..3]; # @subarray2 = (2,3,4) @array[0,1] = ("string", 46); # @array =("string",46,3,4,5) now @array[0..3] = (11, 22, 33, 44); # @array = (11,22,33,44,5) now @array[1,2,3] ...
1、push()、pop()和unshift()、shift() 这两组同为对数组的操作，并且会改变数组的本身的长度...
A (very) lightweight introduction in the use of the perl debugger, and a pointer to existing, deeper sources of information on the subject of debugging perl programs. There's an extraordinary number of people out there who don't appear to know anything about ...
真正能使 c 程序员惊讶的是在 Perl 中,赋值语句返回实际的变量作为 lvalue.因此你 可以在同一个语句中多次 改变同一个变量的值.例如可以使用下面的语句: ($temp -= 32) *= 5/9 将华氏温度转换成摄氏温度.这也是为什么在本章的前面我们能使用下面的语句: chop ($number = ); 上面的语句能将 $number ...
The scalar keyword returns the number of elements in an array, so we have to change the < (less than) to <= (less than or equal to) when choosing between scalar or %# so the for loop doesn’t access an out-of-index member. If you’re getting confused, that’s the point. ...
Perl 诊断消息 类别含义 (W)警告(可选) (D)反对(可选) (S)严重警告(必需) (F)致命错误(可捕获) (P)你应该从未见过的内部错误(恐慌性的)(可捕获) (X)非常致命的错误(不可捕获) (A)外来错误消息(不是Perl生成的)
splice- add or remove elements anywhere in an array split- split up a string using a regexp delimiter sprintf- formatted print into a string sqrt- square root function srand- seed the random number generator stat- get a file's status information ...