Multiplying matrices by vectors FORMATTING

[wirelesskill]

Hello,
Im doing assignments where I need to multiply a set matrix with a vector.
Ive defined them below with a = matrix, v = vector

Everything works, but my question is more about formating now

I want it to also display the matrix and vectors and then show the end result. Preferably this would be displayed in a 4x4 matrix and the vector in a 1x4 column. If that makes sense.

Ive never been good at formatting so Im kind of struggling and have no idea where to begin, any pointers would be appreciated.

[jonnin]

maybe something like

for all the rows
{
for all the columns in matrix
{
cout matrix column with formatting
}
cout vector column (1 entry) with format
cout answer column with format //if this were a matrix, you would do all the columns of result loop
cout endl;
}

if you wanted to get ultra fancy, extended ascii has box drawing tools you could write the standard
[] brackets around each matrix with those. That looks like the above with 'if first or last row then draw L bracket else draw | wall symbol repeated 6 times (start matrix, end matrix, start vector, end vector, start answer, end answer).