B_141128_MatrizProducto, C (gcc)

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//Title of this code

#include  <stdio.h>
#include <stdlib.h>
#include <time.h>

#define _FA 12
#define _CA 8
#define _FB _CA
#define _CB 9
#define _FP _FA
#define _CP _CB

int main(void)
{
    long a[_FA][_CA];
    long b[_FB][_CB];
    long p[_FP][_CP];
    
    short f, c, k;
    
    for(srand(time(NULL)) , f = 0 ; f < _FA ; f++)
    {
        for(c = 0 ; c < _CA ; c++)
        {
            a[f][c] = rand() % 10;
        }
    }
    for(f = 0 ; f < _FB ; f++)
    {
        for(c = 0 ; c < _CB ; c++)
        {
            b[f][c] = rand() % 10;
        }
    }
    for(f = 0 ; f < _FP ; f++)
    {
        for(c = 0 ; c < _CP ; c++)
        {
            p[f][c] = 0;
            for(k = 0 ; k < _CA ; k++)
            {
                p[f][c] += a[f][k] * b[k][c];
            }
        }
    }
    
    for(f = 0 ; f < _FA ; f++)
    {
        for(c = 0 ; c < _CA ; c++)
        {
            printf("%3ld", a[f][c]);
        }
        printf("\n");
    }
    printf("\n\n\n");
    for(f = 0 ; f < _FB ; f++)
    {
        for(c = 0 ; c < _CB ; c++)
        {
            printf("%3ld", b[f][c]);
        }
        printf("\n");
    }
    printf("\n\n\n");
    for(f = 0 ; f < _FP ; f++)
    {
        for(c = 0 ; c < _CP ; c++)
        {
            printf("%5ld", p[f][c]);
        }
        printf("\n");
    }
    printf("\n\n\n");
    
    return 0;
}

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Compilation time: 0.13 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.27 sec