1 | #include <stdio.h> |
2 | |
3 | #define N 1536 |
4 | float A[N][N]; |
5 | float B[N][N]; |
6 | float C[N][N]; |
7 | |
8 | void init_array() |
9 | { |
10 | int i, j; |
11 | |
12 | for (i = 0; i < N; i++) { |
13 | for (j = 0; j < N; j++) { |
14 | A[i][j] = (1+(i*j)%1024)/2.0; |
15 | B[i][j] = (1+(i*j)%1024)/2.0; |
16 | } |
17 | } |
18 | } |
19 | |
20 | void print_array() |
21 | { |
22 | int i, j; |
23 | |
24 | for (i = 0; i < N; i++) { |
25 | for (j = 0; j < N; j++) { |
26 | fprintf(stdout, format: "%lf " , C[i][j]); |
27 | if (j%80 == 79) fprintf(stdout, format: "\n" ); |
28 | } |
29 | fprintf(stdout, format: "\n" ); |
30 | } |
31 | } |
32 | |
33 | int main() |
34 | { |
35 | int i, j, k; |
36 | double t_start, t_end; |
37 | |
38 | init_array(); |
39 | |
40 | for (i = 0; i < N; i++) { |
41 | for (j = 0; j < N; j++) { |
42 | C[i][j] = 0; |
43 | for (k = 0; k < N; k++) |
44 | C[i][j] = C[i][j] + A[i][k] * B[k][j]; |
45 | } |
46 | } |
47 | |
48 | #ifdef TEST |
49 | print_array(); |
50 | #endif |
51 | return 0; |
52 | } |
53 | |