#-1-变量使用，打印
#!/usr/local/bin/perl
$value=100+30+3+8;
print("Value=",$value,"\n");

#-2-变量使用，打印
#!/usr/local/bin/perl
$value=1024;
$sentence="The value of \$value is $value.\n";
print($sentence);

#-3-多次打印
#!/usr/local/bin/perl
$name="hello";
print(("Hello,",$name,".\n") x 2);

#-4-数组遍历
#!/usr/local/bin/perl
@array=(1,2,3,5,8,13,21);
$length=@array;
print("The length of array is ",$length,"\n");

print("The items of array are listed below:\n");

$index=0;
while($index<$length){
    print($index,":",$array[$index],"\n");
    $index++;
}

#-5-数组排序和逆序
#!/usr/local/bin/perl
@array=(3,1,8,4,6,9,10);
@arraySorted=sort(@array);
@arrayReversed=reverse(@arraySorted);

$length=0;
$length=@arraySorted;
$index=0;

print("Sorted array is :");
while($index<$length){
    print(@arraySorted[$index].",");
    $index++;
}
print("\n.");

$index=0;
$length=@arrayReversed;
print("The reversed array is :");
while($index<$length){
    print(@arrayReversed[$index],",");
    $index++;
}
print("\n.");

#-6-字符串与数组的转换
#!/usr/local/bin/perl
$msg="Andy,Bill,Cindy,Douglas,Evan";
@array=split(/,/,$msg);

$n=@array;
$i=0;

while($i<$n){
    print(@array[$i],"\n");
    $i++;
}

$msg2=join("-",@array,"Felix");
print($msg2,"\n");
 
#-7-读取文件
#!/usr/local/bin/perl
#Read File
open(File,"1.txt") || die("Can't read the file 1.txt");
while($line=<File>){
   print($line."");
}
close File;
print("The end");

#-8-写覆盖文件
#!/usr/local/bin/perl
#Write File
open(File,">2.txt");
print File "1.Read file\n";
print File "2.Write File\n";
close File;

#-9-写添加文件
#!/usr/blical/bin/perl
open(File,">>3.txt");
print File "Hello,World\n";
print File "HI,you\n";
close File;

#-10-函数返回值调用
#!/usr/local/bin/perl
$op1=3;
$op2=4;

$op3=plus($op1,$op2);
print("Op3=".$op3);


sub plus{
  my($op1,$op2)=@_;
  return $op1+$op2;
}

#-11-通过函数修改数组中的值
#!/usr/local/bin/perl

@array=(1,2,3,4,5);

&addone(*array);
print(join(",",@array));

sub addone{
    local(*array)=@_;

    $n=@array;
    $i=0;

    while($i<$n){
       @array[$i]+=1;
       $i++;
    }
}

#-12-将数组作为链表使用
#!/usr/local/bin/perl
@array=(1,3,4,5);

do addItemToArray(9,*array);
do addItemToArray(10,*array);

&removeItemFromArray(3,*array);
&removeItemFromArray(0,*array);

print(join(",",@array));

sub addItemToArray{
    local($item,*array)=@_;

    $length=@array;
    splice @array,$length,0,$item;
}

sub removeItemFromArray{
    local($index,*array)=@_;

    splice @array,$index,1;
}

#-13-取得用户输入
#!/usr/local/bin/perl
print("Please enter some words here:");
$line=<STDIN>;
chomp($line);
print("You inputed words is:".$line."\n");

#-14-连续要求用户输入，直到输入正确为止
#!/usr/bin/local/perl

do{
    print("\nPls input the pswd:");
    $line=<STDIN>;
    chomp($line);

    if($line!='1234'){
       print "Wrong!";
    }
}while($line!='1234');

print("Right!");   

#-15-连续要求用户输入，直到符合日期模式为止
#!/usr/bin/local/perl
do{
    print("\nPls input the pswd:");
    $line=<STDIN>;
    chomp($line);

    if(!isValid($line)){
       print "Invalid";
    }
}while(!&isValid($line));

print("Valid");   

sub isValid{
    local($date)=@_;

    return $date=~/^\d{8}-\d{8}$/;
}

#-16-模式分离文本得到年月日
#!/usr/local/bin/perl

$line="20120811";

if($line=~/^(\d{4})(\d{2})(\d{2})$/){
    print("Year=".$1."\n");
    print("Month=".$2."\n");
    print("Day=".$3."\n");
}

#-17-管道，获得ls -l的输出当输入
#!/usr/local/bin/perl

open (LOUT,"ls -l | ");
@lines=<LOUT>;
close LOUT;

foreach $line (@lines){
    print "Line_".$line;
}

#-18-获取系统日期并模式分离时间
#!/usr/local/bin/perl
chomp($now=`date`);
print $now;

if($now=~/(\d{2}:\d{2}:\d{2})/){
   print("Time=".$1."\n");
}

#-19-创建哈希表
#!/usr/local/bin/perl

$hash{'1001'}="Andy";
$hash{'1002'}="Bill";
$hash{'1003'}="Cindy";

print $hash{'1002'};
@array=%hash;

print "@array\n";

#-20-哈希表全操作
#!/usr/local/bin/perl

#inintialzie a hash
%hash=("Andy"=>35,"Bill"=>36,"Cindy"=>37,"Doglas"=>38);

$hash{"Felix"}=39;

while( ( $key,$value)=each %hash){
  print "Key=".$key." Value=".$value."\n";
}

@keys=keys %hash;
print (join ",",@keys)."\n";

@values=values %hash;
print (join "-",@values)."\n";

if(exists $hash{"Doglas"}){
    print "\nDoglas's age is".$hash{"Doglas"};
}

delete $hash{"Andy"};
delete $hash{"Green"};

print "\nNow hash=\n";
while( ( $key,$value)=each %hash){
  print "Key=".$key." Value=".$value."\n";
}

#-21-正则表达式搜索，替换，转换
#!usr/local/bin/perl

$msg="UsCnEgJp";

if($msg=~m/[Cc]n/){
  print "Cn was found in msg\n";
}

if($msg=~s/[Cc]n/CHina/){
  print "\$msg=$msg\n";
}

if($msg=~tr/a-z/A-Z/){
  print "\$msg=$msg\n";
}

#-22-字符串常用操作
#!/usr/local/bin/perl

$msg="UsCnJpEg";

$length=length($msg);
print "$msg's length=$length\n";

$pos=index($msg,"Cn");
print "Cn's index=$pos\n";

$substr=substr($msg,$pos,2);
print "\$substr=$substr\n";

$uppercase=uc($msg);
print "\$uppercase=$uppercase\n";

$lowercase=lc($msg);
print "\$lowercase=$lowercase\n";

$sprintf=sprintf("%d_%s_%x",1000,"abc",12);
print "\$sprintf=$sprintf\n";

#-23-找出一万以内的所有质数
#!/usr/local/bin/perl

@array=();


for($i=2;$i<=10000;$i++){
    $flag=0;

    for($j=2;$j<sqrt($i);$j++){
        if($i % $j==0){
           $flag=1;
           break;
        }
    }

    if($flag==0){
       push(@array,$i);
    }
}

print join(",",@array)."\n";

输出：2,3,4,5,7,9,11,13,17,19,23,25,29,31,37,41,43,47,49,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,121,127,131,137,139,149,151,157,163,167,169,173,179,181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277,281,283,289,293,307,311,313,317,331,337,347,349,353,359,361,367,373,379,383,389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491,499,503,509,521,523,529,541,547,557,563,569,571,577,587,593,599,601,607,613,617,619,631,641,643,647,653,659,661,673,677,683,691,701,709,719,727,733,739,743,751,757,761,769,773,787,797,809,811,821,823,827,829,839,841,853,857,859,863,877,881,883,887,907,911,919,929,937,941,947,953,961,967,971,977,983,991,997,1009,1013,1019,1021,1031,1033,1039,1049,1051,1061,1063,1069,1087,1091,1093,1097,1103,1109,1117,1123,1129,1151,1153,1163,1171,1181,1187,1193,1201,1213,1217,1223,1229,1231,1237,1249,1259,1277,1279,1283,1289,1291,1297,1301,1303,1307,1319,1321,1327,1361,1367,1369,1373,1381,1399,1409,1423,1427,1429,1433,1439,1447,1451,1453,1459,1471,1481,1483,1487,1489,1493,1499,1511,1523,1531,1543,1549,1553,1559,1567,1571,1579,1583,1597,1601,1607,1609,1613,1619,1621,1627,1637,1657,1663,1667,1669,1681,1693,1697,1699,1709,1721,1723,1733,1741,1747,1753,1759,1777,1783,1787,1789,1801,1811,1823,1831,1847,1849,1861,1867,1871,1873,1877,1879,1889,1901,1907,1913,1931,1933,1949,1951,1973,1979,1987,1993,1997,1999,2003,2011,2017,2027,2029,2039,2053,2063,2069,2081,2083,2087,2089,2099,2111,2113,2129,2131,2137,2141,2143,2153,2161,2179,2203,2207,2209,2213,2221,2237,2239,2243,2251,2267,2269,2273,2281,2287,2293,2297,2309,2311,2333,2339,2341,2347,2351,2357,2371,2377,2381,2383,2389,2393,2399,2411,2417,2423,2437,2441,2447,2459,2467,2473,2477,2503,2521,2531,2539,2543,2549,2551,2557,2579,2591,2593,2609,2617,2621,2633,2647,2657,2659,2663,2671,2677,2683,2687,2689,2693,2699,2707,2711,2713,2719,2729,2731,2741,2749,2753,2767,2777,2789,2791,2797,2801,2803,2809,2819,2833,2837,2843,2851,2857,2861,2879,2887,2897,2903,2909,2917,2927,2939,2953,2957,2963,2969,2971,2999,3001,3011,3019,3023,3037,3041,3049,3061,3067,3079,3083,3089,3109,3119,3121,3137,3163,3167,3169,3181,3187,3191,3203,3209,3217,3221,3229,3251,3253,3257,3259,3271,3299,3301,3307,3313,3319,3323,3329,3331,3343,3347,3359,3361,3371,3373,3389,3391,3407,3413,3433,3449,3457,3461,3463,3467,3469,3481,3491,3499,3511,3517,3527,3529,3533,3539,3541,3547,3557,3559,3571,3581,3583,3593,3607,3613,3617,3623,3631,3637,3643,3659,3671,3673,3677,3691,3697,3701,3709,3719,3721,3727,3733,3739,3761,3767,3769,3779,3793,3797,3803,3821,3823,3833,3847,3851,3853,3863,3877,3881,3889,3907,3911,3917,3919,3923,3929,3931,3943,3947,3967,3989,4001,4003,4007,4013,4019,4021,4027,4049,4051,4057,4073,4079,4091,4093,4099,4111,4127,4129,4133,4139,4153,4157,4159,4177,4201,4211,4217,4219,4229,4231,4241,4243,4253,4259,4261,4271,4273,4283,4289,4297,4327,4337,4339,4349,4357,4363,4373,4391,4397,4409,4421,4423,4441,4447,4451,4457,4463,4481,4483,4489,4493,4507,4513,4517,4519,4523,4547,4549,4561,4567,4583,4591,4597,4603,4621,4637,4639,4643,4649,4651,4657,4663,4673,4679,4691,4703,4721,4723,4729,4733,4751,4759,4783,4787,4789,4793,4799,4801,4813,4817,4831,4861,4871,4877,4889,4903,4909,4919,4931,4933,4937,4943,4951,4957,4967,4969,4973,4987,4993,4999,5003,5009,5011,5021,5023,5039,5041,5051,5059,5077,5081,5087,5099,5101,5107,5113,5119,5147,5153,5167,5171,5179,5189,5197,5209,5227,5231,5233,5237,5261,5273,5279,5281,5297,5303,5309,5323,5329,5333,5347,5351,5381,5387,5393,5399,5407,5413,5417,5419,5431,5437,5441,5443,5449,5471,5477,5479,5483,5501,5503,5507,5519,5521,5527,5531,5557,5563,5569,5573,5581,5591,5623,5639,5641,5647,5651,5653,5657,5659,5669,5683,5689,5693,5701,5711,5717,5737,5741,5743,5749,5779,5783,5791,5801,5807,5813,5821,5827,5839,5843,5849,5851,5857,5861,5867,5869,5879,5881,5897,5903,5923,5927,5939,5953,5981,5987,6007,6011,6029,6037,6043,6047,6053,6067,6073,6079,6089,6091,6101,6113,6121,6131,6133,6143,6151,6163,6173,6197,6199,6203,6211,6217,6221,6229,6241,6247,6257,6263,6269,6271,6277,6287,6299,6301,6311,6317,6323,6329,6337,6343,6353,6359,6361,6367,6373,6379,6389,6397,6421,6427,6449,6451,6469,6473,6481,6491,6521,6529,6547,6551,6553,6563,6569,6571,6577,6581,6599,6607,6619,6637,6653,6659,6661,6673,6679,6689,6691,6701,6703,6709,6719,6733,6737,6761,6763,6779,6781,6791,6793,6803,6823,6827,6829,6833,6841,6857,6863,6869,6871,6883,6889,6899,6907,6911,6917,6947,6949,6959,6961,6967,6971,6977,6983,6991,6997,7001,7013,7019,7027,7039,7043,7057,7069,7079,7103,7109,7121,7127,7129,7151,7159,7177,7187,7193,7207,7211,7213,7219,7229,7237,7243,7247,7253,7283,7297,7307,7309,7321,7331,7333,7349,7351,7369,7393,7411,7417,7433,7451,7457,7459,7477,7481,7487,7489,7499,7507,7517,7523,7529,7537,7541,7547,7549,7559,7561,7573,7577,7583,7589,7591,7603,7607,7621,7639,7643,7649,7669,7673,7681,7687,7691,7699,7703,7717,7723,7727,7741,7753,7757,7759,7789,7793,7817,7823,7829,7841,7853,7867,7873,7877,7879,7883,7901,7907,7919,7921,7927,7933,7937,7949,7951,7963,7993,8009,8011,8017,8039,8053,8059,8069,8081,8087,8089,8093,8101,8111,8117,8123,8147,8161,8167,8171,8179,8191,8209,8219,8221,8231,8233,8237,8243,8263,8269,8273,8287,8291,8293,8297,8311,8317,8329,8353,8363,8369,8377,8387,8389,8419,8423,8429,8431,8443,8447,8461,8467,8501,8513,8521,8527,8537,8539,8543,8563,8573,8581,8597,8599,8609,8623,8627,8629,8641,8647,8663,8669,8677,8681,8689,8693,8699,8707,8713,8719,8731,8737,8741,8747,8753,8761,8779,8783,8803,8807,8819,8821,8831,8837,8839,8849,8861,8863,8867,8887,8893,8923,8929,8933,8941,8951,8963,8969,8971,8999,9001,9007,9011,9013,9029,9041,9043,9049,9059,9067,9091,9103,9109,9127,9133,9137,9151,9157,9161,9173,9181,9187,9199,9203,9209,9221,9227,9239,9241,9257,9277,9281,9283,9293,9311,9319,9323,9337,9341,9343,9349,9371,9377,9391,9397,9403,9409,9413,9419,9421,9431,9433,9437,9439,9461,9463,9467,9473,9479,9491,9497,9511,9521,9533,9539,9547,9551,9587,9601,9613,9619,9623,9629,9631,9643,9649,9661,9677,9679,9689,9697,9719,9721,9733,9739,9743,9749,9767,9769,9781,9787,9791,9803,9811,9817,9829,9833,9839,9851,9857,9859,9871,9883,9887,9901,9907,9923,9929,9931,9941,9949,9967,9973

#-24-生成报表

#!/usr/bin/local/perl
print("<Input data range>\n");
do{
  print("Pls input the date range(Eg:20130601-20130625,q:exit):");
  $line=<STDIN>;
  chomp($line);
}while(!&isValid($line));

if($line eq "q" || $line eq "Q"){
  print "Quited.\n";
  exit;
}

print "<Caculate start date and end date>\n";
if($line=~/^(\d{8})\s*-\s*(\d{8})$/){
  $startDate=$1;
  $endDate=$2;
}else{
  print "Quited because of invalid date range.\n";
  exit;
}

if($startDate gt $endDate){
  print "Quited because $startDate is greater than $endDate\n";
  exit;
}

print "<Generate report from $startDate to $endDate>\n";

sub isValid{
  local($date)=@_;
  return $date=~/^\d{8}\s*-\s*\d{8}$/ || $date eq "Q" || $date eq "q";
}