counter 0-99 problem with the first 0 ten

Projects Programming
3

What do you suppose that '1' - '0' is? What do you suppose that '0' - '0' is?

Instead of the 4 line if statement to determine whether to set the pin HIGH or LOW, and to actually do it:

     digitalWrite(puerto[i], numero[p][i] - '0');

all works, except the first 0

You need to explain that, in a lot more detail.