R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> par4 = '16'
> par3 = 'a92b735e76a7dbc2e980b599a3fc50ff'
> par2 = 'y3'
> par1 = 'a-129045610_0.198037687223405_Thu Dec 12 16:33:45 2013'
> par4 <- '16'
> par3 <- 'a92b735e76a7dbc2e980b599a3fc50ff'
> par2 <- 'y3'
> par1 <- 'a-129045610_0.198037687223405_Thu Dec 12 16:33:45 2013'
> #'GNU S' R Code compiled by R2WASP v. 1.2.291 ()
> #Author: aston2
> #To cite this work: I. Holliday, 2012, MC Mock Q11 (v1.2.1) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/Ian.Holliday/rwasp_May_mock6.wasp/
> #Source of accompanying publication: 
> #
> library(digest)
> par4 <- as.numeric(par4)
> if(exists('par2')) {
+ if (par2 != 'wnga') {
+ if (digest(par2,ser=F) == par3) {
+ par4 = par4 + 4
+ lastanswer <- 'correct'
+ }
+ if (digest(par2,ser=F) != par3) {
+ par4 = par4 - 2
+ lastanswer <- 'Incorrect'
+ }
+ }
+ if (par2 == 'wnga') {
+ lastanswer <- 'Skipped Question'
+ }
+ }
> 
> #Note: the /var/wessaorg/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab
> load(file="/var/wessaorg/rcomp/createtable")
> 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'Your last Question',1,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,lastanswer,1,TRUE)
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/wessaorg/rcomp/tmp/1larq1386866643.tab") 
> a<-table.start()
> a<-table.row.start(a)
> a<-table.element(a,'End of MC exam. <b><i>Please, write the hash code on your paper.</b></i>',2,TRUE)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Hash Code',1,TRUE)
> a<-table.element(a,digest(paste(par1,'_',par4,sep=''),ser=F))
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Your exam score',1,TRUE)
> a<-table.element(a,par4)
> a<-table.row.end(a)
> a<-table.row.start(a)
> a<-table.element(a,'Maximum exam score',1,TRUE)
> a<-table.element(a,20)
> a<-table.row.end(a)
> a<-table.end(a)
> table.save(a,file="/var/wessaorg/rcomp/tmp/2sbg21386866643.tab") 
> 
> 
> 
> proc.time()
   user  system elapsed 
  0.472   0.128   0.571