The cpu actually doesn't call the variable but the address of the RAM.The random-access-memory has vertical(column) and transverse(row) addresses,the cpu will send a address values of vertical or transverse or both fields to a register and the register will drive that values to i/o variable data.But a "high-level" programmer doesn't want to remember those addresses.So the simple solution is use the compiler of another computer to function vary the name with the refer address.You're confusing between high-level reality and low-level reality logic.

The cpu actually doesn't call the variable, but the address of the RAM. The random-access-memory has vertical  (column) and transverse  (row) addresses. The cpu sends the address values of vertical or transverse or both fields to a register, and the register will drive that values to the I/O variable data. But a "high-level" programmer doesn't want to remember those addresses. So the simple solution is use the compiler of another computer to function vary the name with the refer address. You're confusing between high-level reality and low-level reality logic.