perform 200-ctTerm.
100-cTrans.
*> open error file
open output error-file
*> change values of cus bal and prodprice for comp
compute cCusBal = function numval(lst-cusBal) end-compute.
compute cProdPrice = function numval(lst-prodPrice) end-compute.
display "CUST BAL1: "cCusBal *> OUPUT: 05815 the corrected value
*> start of transaction comp
if lst-prodStock = 0 then
*> 0 items in stock, update error-file
set eProdNum to lst-prodNum
set zStock to "out of prod"
set eTransNum to lst-transCusNum
set NBH to "could not be handled"
write out-error end-write *> example of output to error-file - prodnum of out prod cusNum could not be handled
close error-file *> close file
go to 200-ctTerm
end-if.
*> order > stock
if lst-transOrder is greater than lst-prodStock then
compute tPrice = lst-prodStock * cProdPrice *> transaction only consists of # in stock
if lst-prodStock is greater or equal lst-transOrder then
compute tPrice = lst-transOrder * cProdPrice *> get orginal total price
*> check order codes and then apply codes
evaluate lst-transCode
when "A"
compute discount = tPrice * .10
compute tPrice = tPrice - discount
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
when "B"
compute discount = tPrice * .20
compute tPrice = tPrice - discount
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
when "C"
compute discount = tPrice * .25
compute tPrice = tPrice - discount
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
when "D"
if lst-transOrder greater or equal 3 then
compute tPrice = tPrice - cProdPrice *> if order > 3 get one free
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
end-if
when "E"
if lst-transOrder greater or equal 1 then
compute BOGO = lst-transOrder / 2 *> check to see how many free
compute tPrice = tPrice - cProdPrice * BOGO *> apply buy one get one
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
end-if
when "Z"
compute lst-prodStock = lst-prodStock - lst-prodStock *>stock now at 0
end-evaluate
end-if.
*> stock >= order
if lst-prodStock is greater or equal lst-transOrder then
compute tPrice = lst-transOrder * cProdPrice *> get orginal total price
*> check order codes and then apply codes
evaluate lst-transCode
when "A"
compute discount = tPrice * .10 *>get discount
compute tPrice = tPrice - discount *>update total price of transaction.
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
when "B"
compute discount = tPrice * .20 *>get discount
compute tPrice = tPrice - discount *>update total price of transaction.
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
when "C"
compute discount = tPrice * .25 *>get discount
compute tPrice = tPrice - discount *>update total price of transaction.
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
when "D"
if lst-transOrder greater or equal 3 then
compute tPrice = tPrice - cProdPrice *> if order > 3 get one free
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
end-if
when "E"
if lst-transOrder greater or equal 1 then
compute BOGO = lst-transOrder / 2 *> check to see how many free
compute tPrice = tPrice - cProdPrice * BOGO *> apply buy one get one
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
end-if
when "Z"
compute lst-prodStock = lst-prodStock - lst-transOrder *>update stock
end-evaluate
display "total Price: "tPrice
display "CUS BAL2 "cCusBal *> OUTP: 05810 - randomly changed
compute cCusBal = cCusBal + tPrice *> which cause this to be wrong
display "New balace: "cCusBal
move cCusBal to lst-cusBal
end-if.
go to 200-ctTerm
exit.
我计算cCusBal并获得正确答案（lst-cusBal = 058.15），然后在我执行计算部分后，我不接触cCusBal，其值从05815随机变化到05810.这会影响计算sCusBal + tPrice和我的预期值为5。我不知道这里发生了什么，任何帮助将不胜感激