Many early computers use ones' complement to represent some kind of signed integer. Examples include the PDP-1, the CDC-6600, and many other popular computers.

The C standard is obviously written with ones' complement machine in mind; for example, it specifies that a signed integer may hold values -32767 to +32767.

But I find that modern day examples of computers that use ones' complement rather hard to come across. I think it's safe to assume that anything you've got that runs a computer program and has signed integers of some kind uses two's complement. So what is the reason for the decline in popularity for ones complement architectures?

Many early computers use ones' complement to represent some kind of signed integer. Examples include the PDP-1, the CDC-6600, and many other popular computers.

The C standard is obviously written with ones' complement machine in mind; for example, it specifies that a signed integer may hold values −32767 to +32767.

But I find that modern day examples of computers that use ones' complement rather hard to come across. I think it's safe to assume that anything you've got that runs a computer program and has signed integers of some kind uses two's complement. So what is the reason for the decline in popularity for ones complement architectures?

Many early computers use one's complement to represent some kind of signed integer. Examples include the PDP-1, the CDC-6600, and many other popular computers.

The C standard is obviously written with one's complement machine in mind; for example, it specifies that a signed integer may hold values -32767 to +32767.

But I find that modern day examples of computers that use ones complement rather hard to come across. I think it's safe to assume that anything you've got that runs a computer program and has signed integers of some kind uses two's complement. So what is the reason for the decline in popularity for ones complement architectures?

Many early computers use ones' complement to represent some kind of signed integer. Examples include the PDP-1, the CDC-6600, and many other popular computers.

The C standard is obviously written with ones' complement machine in mind; for example, it specifies that a signed integer may hold values -32767 to +32767.

But I find that modern day examples of computers that use ones' complement rather hard to come across. I think it's safe to assume that anything you've got that runs a computer program and has signed integers of some kind uses two's complement. So what is the reason for the decline in popularity for ones complement architectures?