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MATMULT1.C
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1993-12-20
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/* Devpac DSP example code MATMULT1.C */
/* for Lattice C */
/* (c) Copyright HiSoft 1993 */
/* All rights reserved */
/* Note that this uses different data to the BASIC examples as
the random number algorithms used by the languages are different
*/
#include <stdio.h>
#include <stdlib.h>
#define N 4
typedef float MATRIX[N][N];
void showmat(MATRIX c)
{
int i,j;
for (j=0;j<N;j++)
{
for (i=0;i<N;i++)
printf("%f\t",c[i][j]);
printf("\n");
}
printf("\n");
}
void mult(MATRIX a,MATRIX b,MATRIX c)
{
int i,j,k;
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]+=a[k][j]*b[i][k];
}
}
int main(void)
{
MATRIX a, b, c;
int i,j;
for (i=0;i<N;i++)
for (j=0;j<N;j++)
{
a[i][j]=(float)(rand())/(RAND_MAX+1);
b[i][j]=(float)(rand())/(RAND_MAX+1);
}
showmat(a);
showmat(b);
mult(a,b,c);
showmat(c);
return 0;
}