int main() {
double a[2][3] = {1,2,3,
4,5,6};
array double b[3][4] = {1,2,3,4,
5,6,7,8,
1,2,3,4};
array double stdv1[2], stdv2[3];
std(a, stdv1);
printf("std(a, stdv1) = %f\n", stdv1);
std(b, stdv2);
printf("std(b, stdv2) = %f\n", stdv2);
}
std(a, stdv1) = 1.000000 1.000000
std(b, stdv2) = 1.290994 1.290994 1.290994