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#include <iostream>
using std::cin;
using std::cout;
using std::endl;
#include <iomanip>
using std::setw;
using std::left;
#include <cstring>
#include <cstdlib>
class course
{
public:
char className[11]; // Class designation
char term[7]; // Term
int units; // Units
char grade; // Grade
course* next; // Next node
};
// Prototype(s)
void printCourse(course*);
int myStrCpy(const char*, const char*);
int myStrCmp(const char*, const char*, size_t count);
int courseCmp(const course*, const course*);
int main()
{
// Declarations
char classEntry;
// Initially empty list
course* head = 0;
course* cEntry = 0;
while(1)
{
// Prompt user to enter class
printCourse(head);
cout << "Would you like to enter another class? [Y/N]: ";
cin >> classEntry;
cin.ignore(1000, 10);
// Break if answer is "no"
if (classEntry == 'N' || classEntry == 'n')
{
printCourse(head);
break;
}
// Otherwise enter all data
else
{
cEntry = new course;
cout << "Enter course name (10 characters max): ";
cin.getline(cEntry->className, 11);
cout << "Enter term (6 characters max): ";
cin.getline(cEntry->term, 7);
cout << "Enter units: ";
cin >> cEntry->units;
cin.ignore(1000, 10);
cout << "Enter grade (letter grade or X if incomplete): ";
cin >> cEntry->grade;
cin.ignore(1000, 10);
// If head is empty, create list
if(head == 0)
{
head = cEntry;
head->next = 0;
}
// Otherwise compare classes and arrange in proper order
else
{
course* x = head;
if (courseCmp(x, cEntry) == 1)
{
while (courseCmp(x, cEntry) == 1)
{
if (x->next != 0 && courseCmp(x->next, cEntry) != -1)
x = x->next;
else
break;
} // End else
cEntry->next = x->next;
x->next = cEntry;
} // End if
else
{
cEntry->next = x;
head = cEntry;
}
} // End else
} // End outer else
} // End while
// Deallocate memory
while (head)
{
course* n = head->next;
delete head;
head = n;
}
return 0;
} // end main
void printCourse(course* p)
{
if (p)
{
cout << endl;
cout << "*Current class history*\n" << endl;
cout << left << setw(10) << "COURSE" << setw(10) << "TERM" << setw(10) << "UNITS" << setw(10) << "GRADE" << endl;
cout << "------- ------ ------ ------" << endl;
for(course* d = p; d;d = d->next)
{
cout << left << setw(10) << d->className;
cout << left << setw(10) << d->term;
cout << left << setw(10) << d->units;
cout << left << setw(10) << d->grade << endl;
}
} // end if (p)
}
int courseCmp(const course* a, const course* b)
{
// validate the length of the strings
if ((strlen(a->term) != 6) || (strlen(b->term) != 6)) // in cstring
return myStrCpy(a->className, b->className);
// handle ties here
if (myStrCpy(a->term, b->term) == 0)
return myStrCpy(a->className, b->className);
// compare the year
int yearA = atoi(a->term + 2); // atoi is found
int yearB = atoi(b->term + 2); // in cstdlib
if (yearA < yearB)
return -1; // termA comes first
if (yearA > yearB)
return 1; // termB comes first
// compare semester in case of same year
if (myStrCmp(a->term, "SP", 2) == 0)
return -1; // termA comes first
if (myStrCmp(a->term, "SU", 2) == 0)
return myStrCmp(b->term, "SP", 2) ? -1 : 1;
return 1;
} // end courseCmp
int myStrCpy(const char* dst, const char* src)
{
int f, l;
do
{
if (((f = (unsigned char)(*(dst++))) >= 'A') && (f <= 'Z')) f -= 'A' - 'a';
if (((l = (unsigned char)(*(src++))) >= 'A') && (l <= 'Z')) l -= 'A' - 'a';
} while (f && (f == l));
return(f - l);
}
int myStrCmp(const char* dst, const char* src, size_t count)
{
int f, l;
do
{
if (((f = (unsigned char)(*(dst++))) >= 'A') && (f <= 'Z')) f -= 'A' - 'a';
if (((l = (unsigned char)(*(src++))) >= 'A') && (l <= 'Z')) l -= 'A' - 'a';
} while (--count && f && (f == l));
return (f - l);
}
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