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This program uses a 2D array to store the subjects in a school timetable, each day taking up a column in the array.
It also uses a 1D array to store the name of each day of the week.
The contents of the timetable are displayed using a pair of for loops, one nested inside the other.
Once displayed, the user is asked to type in a subject to search for. The results are then displayed on the screen.
Select and copy the C++ source-code at the bottom of this post.
Paste into a text editor, such as Nano or Geany.
Then save the new file, ending in .cpp
I used timetable.cpp
To compile from the command-line:
g++ -o timetable.cpp timetable
To run from the command-line:
./timetable
In order to see how the nested for loops are used to display the contents of the timetable array, you can uncomment the call to the usleep function and cout << flush; statement so that the program pauses for half a second after displaying each subject.
Code is below...
#include <iostream> // Code to display text on screen
#include <unistd.h> // To slow down the program with usleep if you want to
using namespace std; // Using standard names cout and endl
int main()
{
// These constants control how large the timetable is
const int DAYS_IN_WEEK = 5;
const int LESSONS_PER_DAY = 6;
// These colour codes will be used when displaying the timetable
const string GREEN = "\e[32m";
const string NORMAL = "\e[0m";
const char TAB = "\t";
// --------------------
// This 1D array hold the name of each day of the week
string dayName[DAYS_IN_WEEK];
dayName[0] = "Mon";
dayName[1] = "Tues";
dayName[2] = "Weds";
dayName[3] = "Thur";
dayName[4] = "Fri";
// --------------------
// This 2D array will hold the lessons for each day
string timetable[LESSONS_PER_DAY][DAYS_IN_WEEK];
// Set values for Monday - day 0
timetable[0][0] = "Maths";
timetable[1][0] = "English";
timetable[2][0] = "Art";
timetable[3][0] = "Art";
timetable[4][0] = "PE";
timetable[5][0] = "PE";
// Set value for Tuesday - day 1
timetable[0][1] = "Science";
timetable[1][1] = "Science";
timetable[2][1] = "French";
timetable[3][1] = "History";
timetable[4][1] = "French";
timetable[5][1] = "Maths";
// Set value for Wednesday - day 2
timetable[0][2] = "Art";
timetable[1][2] = "Art";
timetable[2][2] = "German";
timetable[3][2] = "Maths";
timetable[4][2] = "Science";
timetable[5][2] = "Geog";
// Set value for Thursday - day 3
timetable[0][3] = "PE";
timetable[1][3] = "PE";
timetable[2][3] = "Drama";
timetable[3][3] = "Geog";
timetable[4][3] = "Music";
timetable[5][3] = "History";
// Set value for Friday - day 4
timetable[0][4] = "Music";
timetable[1][4] = "Art";
timetable[2][4] = "German";
timetable[3][4] = "Maths";
timetable[4][4] = "D&T";
timetable[5][4] = "D&T";
// --------------------
// Display headings in green
cout << GREEN << "Lesson\t";
for ( int day = 0; day < DAYS_IN_WEEK; day++ )
cout << dayName[day] << TAB << TAB;
// Move on to next line, ready to display lessons
cout << endl;
// --------------------
// Display the lessons for each day
for ( int lesson = 0; lesson < LESSONS_PER_DAY; lesson++ )
{
// Display lesson number in green text
cout << GREEN << lesson + 1 << NORMAL << "\t";
// Display name of each lesson in normal colour text
for ( int day = 0; day < DAYS_IN_WEEK; day++ )
{
cout << timetable[lesson][day] << TAB << TAB;
// Slow down the program so you can see how the loops work
// Uncomment these next 2 lines for slower speed!
//cout << flush; // Update screen immediately
//usleep(500000); // half a second delay
} // end of for loop that controls day number
// Go on to next line of screen after all days displayed for this row
cout << endl;
} // end of for loop that controls lesson number
// --------------------
// Search through each day for a particular subject
cout << endl;
cout << "Which subject do you want to search for?" << endl;
string subjectToFind;
cin >> subjectToFind;
int timesFound = 0;
// Search results will be shown in green
cout << GREEN;
for ( int day = 0; day < DAYS_IN_WEEK; day++ )
{
for ( int lesson = 0; lesson < LESSONS_PER_DAY; lesson++ )
{
// Determine whether this is the subject you are searching for
if ( subjectToFind == timetable[lesson][day] )
{
cout << "Lesson " << lesson + 1;
cout << " on a ";
cout << dayName[day] << endl;
timesFound++;
}
} // end of for loop that controls day number
} // end of for loop that controls lesson number
// Warn user if the subject could not be found
if ( timesFound == 0 )
cout << "None found." << endl;
// Set text back to normal colours for your terminal
cout << NORMAL;
// --------------------
return 0;
}
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