How do you construct a Multidimensional Array?

Question

Create a flowchart and write a complete C++ program that declares a 2 dimensional integer array of size 10 rows and 10 columns. The program should use two nested for loops to fill the array with the even numbers beginning with 2 in the [0][0] element and filling the first row with 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 and then continuing on the second row with 22, 24, etc… The program should then use nested for loops to print the array in table form to the screen.

I am using Microsoft Visual Studio.

I understand one dimensional arrays and I have no idea of how to write a program for the above question. Please help!

Answer 1

The code to declare and initialize an array has the pattern:



....int myarray[10][10]; // or int[10][10] myarray; ...if you prefer. I'm an old C programmer.



....// ignore leading dots; they're just for indentation. change .... to 4 spaces globally after

....// a cut and paste, if you want to compile.



....for (int row=0; row<10; ++row)

....{

........for (int col=0; col<10; ++col)

........{

............myarray[row][col] = ;

........}

....}



Print out the array with:



....for (int row=0; row <10; ++row)

....{

........for (int col=0; col<10; ++col)

........{

............cout << " " << myarray[row][col];

........}

........cout << endl;

....}



Put this in a function, if you've learned how to do that yet, so you can use it in multiple places in your code while you are experimenting and debugging. If not, don't worry...just copy and paste.



I left out how to calculate the myarray[row][col] value during initialization. You should try to figure that out. Try 100*row + 3*col, for example, to see what that does. Someone else will probably give you an answer, but you really are better off experimenting and discovering on your own.

Answer 2

Here's an overview of C++ multidimensional arrays with examples.

Answer 3

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