/* mat2.c */
#include <stdio.h>

#define SARAKKEITA 3
typedef double Rivi_tyyppi[SARAKKEITA];

double alkioiden_summa(Rivi_tyyppi *mat, int riveja)
{
  int i,j; double summa=0;

  for (i=0; i<riveja; i++)
    for (j=0; j<SARAKKEITA; j++)
      summa +=mat[i][j];
  return summa;
}

int main(void)
{
  double s2,s3; 
  Rivi_tyyppi mat2[2] = { {1,2,3},{4,5,6} },
              mat3[3] = { {1,0,0},{0,1,0},{0,0,1} };

  s2 = alkioiden_summa(mat2,2);
  s3 = alkioiden_summa(mat3,3);

  printf("Summat on %5.2lf ja %5.2lf\n",s2,s3);

  return 0;
}