File: matmul.c

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (52 lines) | stat: -rw-r--r-- 858 bytes parent folder | download | duplicates (26) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
#include <stdio.h>

#define N 1536
float A[N][N];
float B[N][N];
float C[N][N];

void init_array()
{
    int i, j;

    for (i = 0; i < N; i++) {
        for (j = 0; j < N; j++) {
            A[i][j] = (1+(i*j)%1024)/2.0;
            B[i][j] = (1+(i*j)%1024)/2.0;
        }
    }
}

void print_array()
{
    int i, j;

    for (i = 0; i < N; i++) {
        for (j = 0; j < N; j++) {
            fprintf(stdout, "%lf ", C[i][j]);
            if (j%80 == 79) fprintf(stdout, "\n");
        }
        fprintf(stdout, "\n");
    }
}

int main()
{
    int i, j, k;
    double t_start, t_end;

    init_array();

    for (i = 0; i < N; i++) {
        for (j = 0; j < N; j++) {
            C[i][j] = 0;
            for (k = 0; k < N; k++)
                C[i][j] = C[i][j] + A[i][k] * B[k][j];
        }
    }

#ifdef TEST
    print_array();
#endif
    return 0;
}