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 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
| #include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <strings.h>
#include <limits.h>
float *allocate_1D_f( unsigned long long int n )
{
unsigned long long int i;
float *p = NULL;
if ((p = (float *)malloc(n*sizeof(float))))
for ( i=0 ; i<n ; i++ )
p[i]=0;
else printf("allocate_1D_f -> %s\n", strerror(errno));
return p;
}
void matrix_destroy( float **p, unsigned long long int x )
{
if (p)
{
unsigned long long int i;
for ( i=0 ; i<x ; i++ )
free(p[i]), p[i]=NULL;
free(p), p=NULL;
}
}
float **matrix_create( unsigned long long int x, unsigned long long int y )
{
float **t = NULL;
if ( (t = (float**)malloc( x*sizeof(float*))) )
{
unsigned long long int i;
for ( i=0 ; i<x ; i++ )
{
if ( !( t[i] = allocate_1D_f(y) ) )
{
printf("matrix_create -> %s\n", strerror(errno));
matrix_destroy(t,i-1);
i=x;
}
}
}
else printf("matrix_create -> %s\n", strerror(errno));
return t;
}
void matrix_display( float **p, unsigned long long int x, unsigned long long int y, const char *name)
{
if(p)
{
printf("-----------------%s-----------------\n", name);
unsigned long long int i,j;
for (i=0 ; i<x ; i++)
for (j=0 ; j<y ; j++)
printf("p[%I64u][%I64u]=%f\n", i, j, p[i][j]);
}
else printf("matrix_display -> %s\n", strerror(errno));
}
void matrix_fill_random(float ** matrix, unsigned long long int x, unsigned long long int y)
{
if(matrix)
{
unsigned long long int i,j;
for ( i=0 ; i<x ; i++ )
for ( j=0 ; j<y ; j++ )
matrix[i][j]=0.001*(rand()%INT_MAX);
}
else printf("matrix_fill_random -> %s\n", strerror(errno));
}
unsigned short matrix_are_multipliable( unsigned long long int m0_y, unsigned long long int m1_x )
{
if ( m0_y == m1_x )
return 1;
return 0;
}
float **matrix_multiply(float **m0, float **m1, unsigned long long int m0_x, unsigned long long int m0_y, unsigned long long int m1_x, unsigned long long int m1_y)
{
float **m = NULL;
if ( m0&&m1 )
{
if ( matrix_are_multipliable(m0_y, m1_x)==1 )
{
if ( (m=matrix_create(m0_x,m1_y)) )
{
unsigned long long int i,j,repeat=0;
for( i=0 ; i<m0_x ; i++ )
{
for ( j=0 ; j<m1_y ; j++ )
{
while( repeat != m0_y )
{
m[i][j] += m0[i][repeat]*m1[repeat][j];
repeat++;
}
repeat=0;
}
}
}
else printf("matrix_multiply -> %s\n", strerror(errno));
}
else printf("matrix_multiply -> matrix can't be multiplied\n");
}
else printf("matrix_multiply -> %s\n", strerror(errno));
return m;
}
int main()
{
float **m1 = matrix_create(5,5);
float **m2 = matrix_create(5,9);
matrix_fill_random(m1,5,5);
matrix_fill_random(m2,5,9);
matrix_display(m1,5,5,"m1");
matrix_display(m2,5,9,"m2");
float **m0 = matrix_multiply(m1,m2,5,5,5,9);
matrix_display(m0,5,9,"m0");
matrix_destroy(m2,5);
matrix_destroy(m0,5);
matrix_destroy(m1,5);
return 0;
} |
Partager