Please I need help debugging this code, with explanations thanks

// Cooper College maintains a master file of students and credits // earned. Each semester the master is updated with a transaction // file that contains credits earned during the semester. // Each file is sorted in Student ID number order.

start Declarations num masterID string masterName num masterCredits num transID num transCredits

string bothDone = "N" num HIGH_VALUE = 999999 InputFile master InputFile trans OutputFile newMaster getReady() while bothDone = "N" detailLoop() endwhile allDone() stop

getReady() open master "studentFile.dat" open trans "semesterCredits.dat" open newMaster "updatedStudentFile.dat" readMaster() readTrans() checkBoth() return

readMaster() input masterID, masterName, masterCredits from master if eof then masterID = HIGH_VALUE endif return

readTrans() input transID, transCredits from trans if eof then transID = HIGH_VALUE endif return

checkBoth() if masterID = HIGH_VALUE AND transID = HIGH_VALUE then bothDone = "Y" endif return

detailLoop() if masterID = transID then match() else if masterID > transID then noMasterForTrans() else noTransForMaster() endif endif return match() masterCredits = transCredits output masterID, masterName, masterCredits to newMaster readMaster() readTrans() return

noMasterForTrans() output "No master file record matches transaction ", masterID readTrans() return

noTransForMaster() output masterID, masterName, masterCredits to newMaster return

allDone() close master close trans close newMaster return