++ is useful to switch over the items of a string: switch (x++) { case ‘+’: if (x == ‘+’) { op = OP_INC; x++;

++ is useful to switch over the items of a string: switch (x++) { case ‘+’: if (x == ‘+’) { op = OP_INC; x++; } else if (x == ‘=‘) { op = OP_ADDEQ; x++; } else { op = OP_ADD; } break; … }