C_141127_MatrizProducto, C (gcc)

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//Title of this code

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

#define _FA 3
#define _CA 4
#define _FB _CA
#define _CB 5
#define _FS _FA
#define _CS _CB

int main(void)
{
    long a[_FA][_CA];
    long b[_FB][_CB];
    long suma[_FS][_CS];
    
    short f, c, i;
    
    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 < _FS ; f++)
    {
        for(c = 0 ; c < _CS ; c++)
        {
            for(suma[f][c] = 0 , i = 0 ; i < _CA ; i++)
            {
                suma[f][c] += a[f][i] * b[i][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 < _FS ; f++)
    {
        for(c = 0 ; c < _CS ; c++)
        {
            printf("%5ld", suma[f][c]);
        }
        printf("\n");
    }
    printf("\n\n\n");
   
    
    return 0;
}

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Compilation time: 0.13 sec, absolute running time: 0.05 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.19 sec