Describe a function (in C) that does the following
Input : an integer.
Output: if that integer is 4, the function returns 7. if that integer is 7, the function returns 4.
constraints:
the input is SURE to be either 4 or 7. no need to validate.
you are not allowed to use any condition/flow commands (if, switch, while, for, trinary operator...)
you are not allowed to use any external library or import anything (like math..)
you are not allowed to use %(modulu), * (multiplication)