Assignment 2 Solution

Transcription

1 Assignment 2 Solution Date.h #ifndef DATE_H #define DATE_H #include <iostream> class Date time_t date; public: Date(); Date(const Date&) = default; Date(time_t); // Date in time_t format Date(const char*); // format "mm/dd/yy" or "mm-dd-yy" or "ddmonyy" time_t getdate() const return date; ; std::ostream& operator<<(std::ostream&, const Date&); int TwoBytesCharToInt(const char* arg); int charmontoint(const char* arg); #endif /* DATE_H */ Date.cpp #include <ctime> #include <cstring> #include <cctype> #include <iomanip> using namespace std; #include "Date.h" Date::Date() : date(time(0)) Date::Date(time_t arg) : date(arg) // Date in format "mmddyy" Date::Date(const char* arg) tm tmtemp = 0,0,0,0,0,0,0,0,0; if (strlen(arg) == 7) tmtemp.tm_mday = TwoBytesCharToInt(arg); tmtemp.tm_year = TwoBytesCharToInt(arg+5) + 100; tmtemp.tm_mon = charmontoint(arg+2);

2 else tmtemp.tm_mday = TwoBytesCharToInt(arg+3); tmtemp.tm_year = TwoBytesCharToInt(arg+6) + 100; tmtemp.tm_mon = TwoBytesCharToInt(arg) - 1; date = mktime(&tmtemp); int TwoBytesCharToInt(const char* arg) char temp[3]; strncpy(temp,arg,2); temp[2] = 0; return atoi(temp); int charmontoint(const char* arg) char mons[] = "janfebmaraprmayjunjulaugsepoctnovdec"; char temp[4]; temp[0] = tolower(temp[0]); temp[1] = tolower(temp[1]); temp[2] = tolower(temp[2]); temp[3] = 0; return (strstr(mons,temp) - mons) / 3; std::ostream& operator<<(std::ostream& out, const Date& obj) time_t temp = obj.getdate(); tm* ptr = localtime(&temp); out << setw(2) << setfill('0') << ptr->tm_mon + 1 << '/' << setw(2) << ptr->tm_mday << '/' << setw(2) << ptr->tm_year % 100; out << setfill(' '); return out; Score.h #ifndef SCORE_H #define SCORE_H #include <iostream> #include "Date.h" class Score char name[16];

3 int score; Date date; public: Score() = default; Score(const Score&) = default; Score(const char* name, int scr, const Date&); const char* getname() const return name; int getscore() const return score; Date getdate() const return date; bool operator<(const Score& obj) const; ; std::ostream& operator<<(std::ostream& out, const Score& obj); #endif /* SCORE_H */ Score.cpp #include <cstring> #include <iomanip> using namespace std; #include "Score.h" Score::Score(const char* n, int scr, const Date& obj) : score(scr), date(obj) strcpy(name, n); bool Score::operator<(const Score& obj) const return score < obj.score; ostream& operator<<(ostream& out, const Score& obj) out << left << setw(16) << obj.getname() << right << setw(5) << obj.getscore() << " " << obj.getdate(); return out; main.cpp #include <cstdlib> #include <iostream> #include <iomanip> #include <fstream> #include <cstring> #include <cctype>

4 using namespace std; #include "Date.h" #include "Score.h" const unsigned MaxNumberOfScores = 10; const string InputFile = "c:/temp/ass2data.txt"; const string ScoresFile = "c:/temp/scores.bin"; void rtrim(char* arg); unsigned getscoresfromfile(const string& filename, Score* scores); void writescorestofile(const string& fn, Score* scores, unsigned num); bool processinputfile(ifstream& fin, Score& score); void sort(score* scores, int numscores); void swap(score& a, Score& b); void erasescoresfile(const string& filename); int main() Score scores[maxnumberofscores]; ifstream fin(inputfile); if (!fin) cerr << "Unable to open input file " << InputFile << endl; exit(1); Score newscore; unsigned numscores; bool updatescores = false; erasescoresfile(scoresfile); while (processinputfile(fin, newscore)) // read record from input // read binary Scores file numscores = getscoresfromfile(scoresfile, scores); if (numscores < MaxNumberOfScores) // Less than 10 Scores scores[numscores++] = newscore; updatescores = true; // newscore > lowest of Top Scores else if (scores[numscores - 1] < newscore) scores[numscores - 1] = newscore; // add newscore to array updatescores = true; else updatescores = false;

5 if (updatescores) sort(scores, numscores); // sort Scores for (auto i = 0U; i < numscores; ++i) cout << left << setw(3) << i+1 << scores[i] << endl; cout << " \n"; // Write binary Scores file writescorestofile(scoresfile, scores, numscores); void rtrim(char* arg) for (auto i = strlen(arg) - 1; i >= 0; --i) if (isspace(arg[i])) arg[i] = 0; else break; unsigned getscoresfromfile(const string& filename, Score* scores) ifstream fin(filename, ios_base::binary); if (!fin.is_open()) cout << "Creating new scores file..." << endl; ofstream fout(filename); fout.close(); return 0; int count = 0; while (fin.read(reinterpret_cast<char*>(scores + count), sizeof (Score))) ++count; fin.close(); return count; void writescorestofile(const string& filename, Score* scores, unsigned numscores) ofstream fout(filename, ios_base::binary); if (!fout.is_open()) cerr << "Unable to write new scores file. Exiting..." << endl; exit(2); for (auto i = 0U; i < numscores and i < MaxNumberOfScores; ++i)

6 fout.write(reinterpret_cast<const char*> (scores + i), sizeof (Score)); fout.close(); bool processinputfile(ifstream& fin, Score& score) char buffer[33]; char namebuf[16], datebuf[11], scorebuf[3]; Date tempdate; fin.getline(buffer, sizeof (buffer)); if (!fin) return false; strncpy(namebuf, buffer, sizeof (namebuf) - 1); namebuf[sizeof (namebuf) - 1] = 0; strncpy(datebuf, buffer + 16, sizeof (datebuf) - 1); datebuf[sizeof (datebuf) - 1] = 0; strncpy(scorebuf, buffer + 29, sizeof (scorebuf) - 1); scorebuf[sizeof (scorebuf) - 1] = 0; rtrim(namebuf); rtrim(datebuf); rtrim(scorebuf); if (!*datebuf) tempdate = Date(); else tempdate = Date(datebuf); score = Scorenamebuf, atoi(scorebuf), tempdate; return true; void sort(score* scores, int numscores) bool swapoccurred; do swapoccurred = false; for (auto i = 0; i < numscores - 1; i++) if (scores[i] < scores[i + 1]) swap(scores[i], scores[i + 1]); swapoccurred = true; while (swapoccurred); void swap(score& a, Score& b) Score temp; temp = a; a = b; b = temp;

7 void erasescoresfile(const string& filename) ofstream fout(filename);