Comparing time?

[Guest_imported]

Vis-C-tor (Visitor) Oct 16, 2001
hi all,
I am trying to make a program that will allow users to add a course if it does not conflict with any existing course. The program should then check with the existing two courses to see if there is a conflict in time. If there is a conflict, the course will not be added, otherwise added. Finally the updated course list will be displayed.
This is what I got so far and I have reach my limit.
The problem I have is getting C++ to check to see if the time the user input is in conflict with with any existing course.Other than that I know how to do.I have tried the if-statement but with no luck.Can anyone help me out here?

#include<iostream>

struct Time
{ int Hrs;
int Mins;
};

{
char CourseID[10];
Time StartTime;
int Length;
};


Time SetTime();
void PrintTime(Time );

void main()
{//Declaration of an array of type Course of size 5 with first two elements initialized.
Course Current[5] = { {&quot;MTH101&quot;, 9, 30, 75}, {&quot;M212&quot;, 14, 0, 110} };

cout<<&quot;\nEnter course number: &quot;;
cin>>Current[2].CourseID;
Current[2].StartTime = SetTime();
cout<<&quot;\nEnter the length in minutes: &quot;;
cin>>Current[2].Length;



}


//function definitions
Time SetTime()
{ Time T;
cout <<&quot;Enter hours (in military) and minutes separated by a space: &quot;;
cin >> T.Hrs >> T.Mins;
return T;
}

void PrintTime(Time T)
{ if (T.Hrs != 12)
cout << T.Hrs%12 <<':';
else
cout <<T.Hrs <<':';
if (T.Mins < 10 )
cout << '0' <<T.Mins;
else
cout << T.Mins;
if (T.Hrs < 12)
cout <<&quot; AM&quot;;
else
cout <<&quot; PM&quot;;
}

 

[brudnakm]

You should enumerate the available blocks of time. This would allow a straight integer comparison to determine conflicts:

typedef enum {
morning1, // 0800 - 0900
morning2, // 0900 - 1000
et...
eveningN, // 2100 - 2200
special // if more flexibility is needed.
}

These could then index into an array of structures which define them. The user is then given only valid choices.

Brudnakm.

 

[Guest_imported]

thanks for your suggestions, but what about the minutes.
The user will input a course id,start time,and length of the coursee. The minutes have to be taken into consideration too.

 

[Guest_imported]

this is actually a problem to check if the two line segments overlap each other.
say the two line segments : (x1,d1) and (x2,d2);
x is the start point, while d is the length.

Obviously the condition of nonoverlap is:

(x2 >= x1 + d1) || (x1 >= x2 + d2)

You can figure out how this applies to your course scheduling.