Can You Use Arithmetic Operators to Flip Between 0 and 1

x = 1 - x

Will switch between 0 and 1.

Edit: I misread the question, thought the OP could use any operator

A Few more...(ignore these)

x ^= 1       // bitwise operator
x = !x       // logical operator
x = (x <= 0) // kinda the same as x != 1

Without using an operator?

int arr[] = {1,0}
x = arr[x]