binary.c

“Write a recursive function that displays all the binary (base 2)
numbers represented by a string of xs, 0s, and 1s.
The xs represent digits that can be either 0 or 1.
For example, the string 1x0x represents the numbers 1000, 1001, 110,
1101.
The string xx1 represents 001, 011, 101, 111."
wrong file