C++ Times Table Program
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I took my homework, did it, then turned it into a a lot more. I added menu navigation, different times tables tools, added a compare array printing vs for loop printing. This isn't a complete program and may still contain bugs.

Here is main file TimesTable.cpp

//Times Table Console App By William Arends 
#include <iostream> 
#include <ctime> 
#include <limits> 
#include "ConsoleAPIclr.h" 
 
 
 
//Namespaces 
//using namespace System; 
using namespace std; 
 
//Constants 
const int TABLE_SIZE = 25; 
const int DEFAULT_BUFFER_SIZE = 1000; 
 
//Prototypes 
void BuildTimesTable(int [][TABLE_SIZE],int); 
void BuildTimesTable(int [][50], int); 
void PrintTimesTable(int [][TABLE_SIZE],int); 
void PrintTimesTable(int [][50],int); 
void PrintTimesTableLite(int); 
void ReturnToMainMenu(); 
void PrintTimesTable(int); 
void PrintTimesTable(int, int); 
void PrintGlobalStats(); 
void MenuOptionOne(); 
void MenuOptionTwo(); 
void MenuOptionThree(); 
void MenuOptionFour(); 
 
//Global Variables 
double totalOfAllTablesRan = 0; 
double totalTime = 0; 
 
int main() 
{ 
//Set up buffer of the console so it can handle larger times tables. 
ConsoleAPIclr console = ConsoleAPIclr(); 
console.SetWidth(DEFAULT_BUFFER_SIZE * 2); 
console.SetHeight(DEFAULT_BUFFER_SIZE / 2); 
 
 
char userinput = ' '; 
while(userinput != 'q')//While the user has not entered q to quit. 
{ 
system("CLS"); 
//cout << Console::BufferWidth << end;
 cin.clear();//clear any bad inputs
 //Print out main menu
 cout << "############# TIMES TABLE CONSOLE PROGRAM ###############" << endl;
 cout << "############### Wrote by William Arends #################" << endl << endl;
 //Print program global stats
 PrintGlobalStats();
 cout << endl
 << " #------------------------------------#" << endl
 << " |-Enter 1 for 2d array times table |" << endl
 << " |-Enter 2 for dynamic times table |" << endl
 << " |-Enter 3 for the range times table |" << endl
 << " |-Enter 4 2d array vs dynamic |" << endl
 << " |-Enter r reset globals |" << endl
 << " |-Enter o for the options |" << endl
 << " |-Enter q to quit program |" << endl
 << " #------------------------------------#" << endl;

cout << endl << "**Enter your choice(1,2,3,r,o,q): " << endl;

//Get user input
  userinput = getchar();

//Normal times table using 2d array
  if (userinput == '1')
  {
   MenuOptionOne();
  }

//Dynamic Times table
  if (userinput == '2')
  {
   MenuOptionTwo();
  }
  //Range times table
  if (userinput == '3')
  {
   MenuOptionThree();
  }

//Compare
  if (userinput == '4')
  {
   MenuOptionFour();
  }

//Reset Globals
 if (userinput == 'r')
 {
 system("CLS");
 totalTime = 0;
 totalOfAllTablesRan = 0;
 cout << "GLOBAL STATS CLEARED!!" << endl << endl;
 ReturnToMainMenu();
 }

if (userinput == 'o') 
 {
 int width = console.GetWidth();
 int height = console.GetHeight();
 cout << "Set the back buffer width(current value " << console.GetWidth() << "):";
 cin >> width; 
console.SetWidth(width); 
cout << "Set the back buffer height(current value " << console.GetHeight() << "):";
 cin >> height; 
console.SetHeight(height); 
} 
} 
return 0; 
} 
 
//void SetOptions() 
//{ 
// int width = Console::BufferWidth; 
// int height = Console::BufferHeight; 
// 
// system.("CLS"); 
// cout << "Set console buffer width[current value = " << Console::BufferWidth << " ]:";
// cin.
// cout << "Set console buffer height[current value = " << Console::BufferHeight << " ]:";
//
//}

void ReturnToMainMenu()
{
  //The program kept closing after this so I had to insert this with my IDE.

PrintGlobalStats();
 cout << "Enter any key to go back to the main menu....";
 getchar();
 getchar();
 getchar();
 cin.clear();
}

void MenuOptionOne()
{
 system("CLS");
 cout << " -Welcome to a times table console program-" << endl
 << " Building a 25x25 times table." << endl;

double start = clock();//Capture the time
 //Now since we got the size we can build the table with BuildTimesTable function
 //and make our 2d array since we now know our size.
 int TimesTable[TABLE_SIZE][TABLE_SIZE];//Create 2d array
 
 BuildTimesTable(TimesTable, TABLE_SIZE);//Populate it with times table values
 PrintTimesTable(TimesTable, TABLE_SIZE);//Print the 2d array values in a formatted way
 
 cout << "-Time to complete in millisecs: " << clock()-start << endl;//get time then subtract from our first time capture to get milliseconds then print
 totalTime += clock()-start;//Add to the global total
 ReturnToMainMenu();//Exit to menu call

}

void MenuOptionTwo()
{
  system("CLS");
  int tableSize = 10;

cout << " -Welcome to the dynamic times table console program-" << endl 
 << "This doesn't use any array it uses a for loop, user input, and simple math to print values." << endl
 << "It doesn't use any memory to do this. It just does the math and then prints it. " << endl << endl
 << "WARNING: The bigger the number is the more time it will take to calculate" << endl
 << "##NOTE Increase the size of the console window if needed by right clicking the title bar and " << endl
 << "##then click Properites>Layout>Window Size. Edit the vaules to make it bigger to see larger tables " << endl << endl
 << "Enter a integer for the size of the table (ex: 10, 20, 100)";

cin >> tableSize; 
 
double start = clock();//Capture the time 
 
PrintTimesTable(tableSize); 
 
cout << "-Time to complete in millisecs: " << clock()-start << endl;//get time then subtract from our first time capture to get milliseconds
 totalTime += clock()-start;//Add to the global total
 ReturnToMainMenu();//Exit to menu call
}

void MenuOptionThree()
{
 system("CLS");
 int start = 1;
 int end = 1;
 
 cout << " -Welcome to the range times table console program-" << endl << endl
 << "This will print times table values from a section of the times table." << endl
 << "So say you want to see the values deeper in the table like from 50 to 60." << endl
 << "with the range times table program you can." << endl << endl
 << "WARNING: The bigger the number is the more time it will take to calculate" << endl
 << "##NOTE Increase the size of the console window if needed by right clicking the title bar and " << endl
 << "##then click Properites>Layout>Window Size. Edit the vaules to make it bigger to see larger tables " << endl << endl
 << "Enter where to start the times table at: ";

cin >> start; 
 
cout << "Enter a number larger then the first one for where to end table at: ";

cin >> end; 
cout << endl;
 double cstart = clock();//Capture the time
 
 PrintTimesTable(start, end);
 
 cout << "-Time to complete in millisecs: " << clock()-cstart << endl;//get time then subtract from our first time capture to get milliseconds
 
 totalTime += clock()-cstart;//Add to the global total
 
 ReturnToMainMenu();//Exit to menu call

}

//compare 
void MenuOptionFour()
{
 system("CLS");
 cout << " -Welcome to a times table SHOW DOWN! 2D array vs. for loop printing!-" << endl
 << "Building two tables of 50x50 to compare speed of the 2d array vs the for loop." << endl;
 double Time1 = 0;
 double Time2 = 0;
 double start = clock();//Capture the time

if (1)//This is will always be true and happen it here to make sure array only lives in this if loop then is disposed
 {
 int TimesTable[50][50];//Create 2d array
 
 BuildTimesTable(TimesTable, 50);//Populate it with times table values
 PrintTimesTable(TimesTable, 50);//Print the 2d array values in a formatted way
 
 Time1 = clock()-start;
 }
 system("CLS");
 cout << "Disposed of 2d array with scope, so it don't affect next tables speed." << endl;
 
 double start2 = clock();//Capture the time
 
 PrintTimesTableLite(50); 
 
 Time2 = clock()-start2;
 cout << "######################RESULTS######################" << endl;
 cout << "2d array's time in milliseconds: " << Time1 << endl
 << "for loop's time in milliseconds: " << Time2 << endl;

cout << endl
 << "The 2d array makes two functions calls vs for loop's one function call." << endl
 << "Also the for loop doesn't not use a array so it doesn't use any memory." << endl;
 ReturnToMainMenu();//Exit to menu call

}

//This builds or fills the 2d array with the times table values
void BuildTimesTable(int table[][50], int size)
{
 // Other Variables.
 int a, b;
 //start at 1 and + 1 to size to get the our times table results correctly
 //we don't want to times anything by 0 so start at 1
 //size relates to the array's size so add one so loop doesn't stop at 9
 for (a = 1; a < size + 1; ++a) 
 {
 for (b = 1; b < size + 1; ++b) 
 {
 int result = (a)*(b);
 table[a - 1][b - 1] = result;//For loops start at 1 instead of 0 so offset indexs by -1 
 }
 }
}

//This builds or fills the 2d array with the times table values
void BuildTimesTable(int table[][TABLE_SIZE], int size)
{
 // Other Variables.
 int a, b;
 //start at 1 and + 1 to size to get the our times table results correctly
 //we don't want to times anything by 0 so start at 1
 //size relates to the array's size so add one so loop doesn't stop at 9
 for (a = 1; a < size + 1; ++a) 
 {
 for (b = 1; b < size + 1; ++b) 
 {
 int result = (a)*(b);
 table[a - 1][b - 1] = result;//For loops start at 1 instead of 0 so offset indexs by -1 
 }
 }
}

void PrintGlobalStats()
{
 cout << "[STATS]" << endl 
 << "GLOBAL BUILD TIME:"
 << " HOURS: " << (totalTime / 1000) / 60 / 60 
 << " MINUTES: " << (totalTime / 1000) / 60 
 << " SECONDS: " << totalTime / 1000 
 << " MILLISECONDS: " << totalTime
 << endl;//print the global time total variable
 cout << "GLOBAL TABLE TOTAL: " << totalOfAllTablesRan << endl//print the global total of tables
 << "[STATS]-" << endl;
}

void PrintTimesTable(int table[][50], int size)
{
 // Other Variables.
 int a, b;
 double total = 0;//running total for sum of all table values
 for (a = 0; a < size; ++a) 
 {
 for (b = 0; b < size; ++b) 
 {
 printf("%9d", table[a][b]);
 //total += table[a][b];//Add to total
 //totalOfAllTablesRan += table[a][b];//Add to global total
 }
 printf("\n\n");//Double newline to get a good looking spacing.
 }
 //cout << "-//The total of all the times table values is " << total << endl;
}

void PrintTimesTable(int table[][TABLE_SIZE], int size)
{
 // Other Variables.
 int a, b;
 double total = 0;//running total for sum of all table values
 for (a = 0; a < size; ++a) 
 {
 for (b = 0; b < size; ++b) 
 {
 printf("%9d", table[a][b]);
 total += table[a][b];//Add to total
 totalOfAllTablesRan += table[a][b];//Add to global total
 }
 printf("\n\n");//Double newline to get a good looking spacing.
 }
 cout << "-The total of all the times table values is " << total << endl;
}

void PrintTimesTable(int size)
{
 // Other Variables.
 int a, b;
 double total = 0;//running total for sum of all table values
 for (a = 1; a < size + 1; ++a) 
 {
 for (b = 1; b < size + 1; ++b) 
 {
 printf(" %9d ", a*b);
 total += a*b;//Add to total
 totalOfAllTablesRan += a*b;//Add to global total
 }
 printf("\n\n");//Double newline to get a good looking spacing.
 }
 cout << "-The total of all the dynamic times table values is " << total << endl;
}

void PrintTimesTableLite(int size)
{
 // Other Variables.
 int a, b;
 //double total = 0;//running total for sum of all table values
 for (a = 1; a < size + 1; ++a) 
 {
 for (b = 1; b < size + 1; ++b) 
 {
 printf(" %9d ", a*b);
 //total += a*b;//Add to total
 //totalOfAllTablesRan += a*b;//Add to global total
 }
 printf("\n\n");//Double newline to get a good looking spacing.
 }
 //cout << "-The total of all the dynamic times table values is " << total << endl;
}

void PrintTimesTable(int start, int end)
{
 // Other Variables.
 int a, b;
 double total = 0;//running total for sum of all table values
 for (a = start; a < end + 1; ++a) 
 {
 for (b = start; b < end + 1; ++b) 
 {
 printf("%9d", a*b);
 total += a*b;//Add to total
 totalOfAllTablesRan += a*b;//Add to global total
 }
 printf("\n\n");//Double newline to get a good looking spacing.
 }
 cout << "-The total of all the ranged times table values is " << total << endl;
}

This is the Console class I built, it is CLR so no intellisense when writing. So I made it so timestable.cpp wasn't CLR.

HEADER ConsoleAPIclr

CLASS ConsoleAPIclr.cpp

C++ Times Table Program
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