I have written a program that does matrix multiplication as in the example below and which gives me correct results (compared to online calculators).

However I'm a little unsure whether I can write matrices that I find in math texts in the order in which I see them.Code:int A[3][3] = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} }; int B[3][3] = { {a, b, c}, {d, e, f}, {g, h, i} }; // multiplication along the lines of // (1 * a) + (2 * d) + (3 * g) C[0][0] = A[0][0] * B[0][0] + A[0][1] * B[1][0] + A[0][2] * B[2][0]; ...

Taking this matrix for right-handed, CCW rotation around the x-axis for example:

Can i write this as

Or do the C++ rows represent the columns in the picture above, such that the definition becomes:Code:// c, s are symbolic double Rx[3][3] = { {1, 0, 0}, {0, c, s}, {0,-s, c} };

To summarize, I'm unsure whether matrices, they way they are written in math texts, can simply be written into C++ arrays "as they appear".Code:double Rx[3][3] = { {1, 0, 0}, {0, c,-s}, {0, s, c} };