POJ 1004 Financial Management

FinancialManagement

TimeLimit:1000MS		MemoryLimit:10000K
TotalSubmissions:87085		Accepted:42411

Description
Larrygraduatedthisyearandfinallyhasajob.He'smakingalotofmoney,butsomehowneverseemstohaveenough.Larryhasdecidedthatheneedstograbholdofhisfinancialportfolioandsolvehisfinancingproblems.The
firststepistofigureoutwhat'sbeengoingonwithhismoney.Larryhashisbankaccountstatementsandwantstoseehowmuchmoneyhehas.HelpLarrybywritingaprogramtotakehisclosingbalancefromeachofthepasttwelvemonthsandcalculatehis
averageaccountbalance.
Input
Theinputwillbetwelvelines.Eachlinewillcontaintheclosingbalanceofhisbankaccountforaparticularmonth.Eachnumberwillbepositiveanddisplayedtothepenny.Nodollarsignwillbeincluded.

Output
Theoutputwillbeasinglenumber,theaverage(mean)oftheclosingbalancesforthetwelvemonths.Itwillberoundedtothenearestpenny,precededimmediatelybyadollarsign,andfollowedbytheend-of-line.Therewillbe
nootherspacesorcharactersintheoutput.
SampleInput

100.00
489.12
12454.12
1234.10
823.05
109.20
5.27
1542.25
839.18
83.99
1295.01
1.75

SampleOutput

$1581.42

java代码如下：

importjava.util.Scanner;
publicclassMain{
publicstaticvoidmain(String[]args){
Scannerin=newScanner(System.in);
doublea[]=newdouble[12];
doublesum=0.0;
for(inti=0;i<12;i++){
a[i]=in.nextDouble();
sum+=a[i];
}
sum/=12;
System.out.printf("$%.2f\n",sum);
}
}