Check if a number is non zero using bitwise operators in C

Question

Check whether a number x is nonzero using the legal operators except !.

Examples: isNonZero(3) = 1, isNonZero(0) = 0

Legal ops: ~ & ^ | + << >>

Note : Only bitwise operators should be used. if, else, for, etc. cannot be used.
Edit1 : No. of operators should not exceed 10.
Edit2 : Consider size of int to be 4 bytes.

int isNonZero(int x) {
return ???;
}

Using ! this would be trivial , but how do we do it without using ! ?

user_1275182 · Answer

This function will return x if it is non-zero, otherwise it will return 0.

int isNonZero(int x)
{
    return (x);
}