C++ Help Multiplying Matrices

>> result matrix being f_bar would be a single number.

That is right, in your special case the result of 'V_prime_matrix[6][1] * d_prime_matrix[1][6]' es quivalent to the scalar product (http://en.wikipedia.org/wiki/Scalar_product) - so you can rewrite your code to just one loop:

int f_bar = 0;
				for (int i = 0; i < 6; i++)
				{
					f_bar += V_prime_matrix[x][0] * d_prime_matrix[0][i];
					cout << f_bar << endl;
				}

Select allOpen in new window

Ooops, that formatting is downright ugly, make that

int f_bar = 0;

	for (int i = 0; i < 6; i++)
	{
		f_bar += V_prime_matrix[x][0] * d_prime_matrix[0][i];
		cout << f_bar << endl;
	}
            

Select allOpen in new window

thanks, but this didnt work. Im getting errors

Um, what errors exactly?

why did you change it to [x][0] and [0][1]? I dont understand that.
Also shouldnt it be f_bar[x][x] or something similar, not just f_bar by itself?

Errors:

Error      1      error C2106: '+=' : left operand must be l-value      c:\users\carlosneal\documents\visual studio 2013\projects\consoleapplication4\consoleapplication4\source.cpp      52      1      ConsoleApplication4
      2      IntelliSense: expression must be a modifiable lvalue      c:\Users\carlosneal\Documents\Visual Studio 2013\Projects\ConsoleApplication4\ConsoleApplication4\Source.cpp      52      3      ConsoleApplication4

Ah, I see - sorry, but then make that

f_bar[0][0] = 0;

	for (int i = 0; i < 6; i++)
	{
		f_bar[0][0] += V_prime_matrix[x][0] * d_prime_matrix[0][i];
		
	}

        cout << f_bar[0][0] << endl;
            
                                            

Select allOpen in new window

still getting errors, its saying that i and j are unreferenced local variables and x is unititialized local variable

Thanks it works now!!

Very helpful and resourceful!!

You're most welcome ;o)