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does anyone have any good idea about how to do multiplication
by 2 square bandmatices?
an effective one ,perhaps


thank you so much

Post me definiotion of your table and function , which initialize it :) I try to find your mistake :))

DM

void digitform(void)
{
strcpy(number[0][0]," - "); strcpy(number[5][0]," - ");
strcpy(number[0][1],"| | "); strcpy(number[5][1],"| ");
strcpy(number[0][2]," "); strcpy(number[5][2 ...

well, it is how i initialize number
strcpy(number[5][0]," - ");
where number is char number[10][5][4]

but it dose lose number[5][0][0] which should be' '
i don't know@@

thanks so much
but i alreaky found the problem

however, i don't understand why the question would appear.
because i declared a global variable : char a[10][4][3]
and initialize each element in a sub function
everything is right in the sub func
but at once leave the sub func-- a[5][0][0] would ...

\
i tried all data on my pc and it is right
but i still got a WA
please help me

i've considered
0 case
blanks

what else did i miss??