23 lines
581 B
QBasic
23 lines
581 B
QBasic
|
10 REM 3x3 Matrix multiplication
|
||
|
|
20 DIM A(2,2), B(2,2), C(2,2)
|
||
|
|
30 REM Matrix A (identity-like)
|
||
|
|
40 DATA 1,2,3,4,5,6,7,8,9
|
||
|
|
50 REM Matrix B
|
||
|
|
60 DATA 9,8,7,6,5,4,3,2,1
|
||
|
|
70 FOR I = 0 TO 2 : FOR J = 0 TO 2 : READ A(I,J) : NEXT J : NEXT I
|
||
|
|
80 FOR I = 0 TO 2 : FOR J = 0 TO 2 : READ B(I,J) : NEXT J : NEXT I
|
||
|
|
90 REM Multiply
|
||
|
|
100 FOR I = 0 TO 2
|
||
|
|
110 FOR J = 0 TO 2
|
||
|
|
120 C(I,J) = 0
|
||
|
|
130 FOR K = 0 TO 2
|
||
|
|
140 C(I,J) = C(I,J) + A(I,K) * B(K,J)
|
||
|
|
150 NEXT K
|
||
|
|
160 NEXT J
|
||
|
|
170 NEXT I
|
||
|
|
180 REM Print result
|
||
|
|
190 FOR I = 0 TO 2
|
||
|
|
200 PRINT USING "####"; C(I,0); C(I,1); C(I,2)
|
||
|
|
210 NEXT I
|
||
|
|
220 PRINT "Matrix mult OK"
|