Code Bot compiler - Online Compiler C. This code reads characters from input until it reaches EOF or a period, and for each character it prints "1" if the character is a digit and "0" otherwise. However, the function `is_digit` is declared but never defined, so the program will not compile. ...

Online Compiler C

#include <stdio.h> int is_digit(char c); int main(void) { int c; while ((c = getchar()) != EOF && c != '.') { if (is_digit((char)c)==1) { printf（"1"）; }else printf("0"); } }

This code reads characters from input until it reaches EOF or a period, and for each character it prints "1" if the character is a digit and "0" otherwise. However, the function `is_digit` is declared but never defined, so the program will not compile.

- The function `is_digit` is declared but has no body. You need to provide the implementation of this function so it can check whether a character is a digit.
- In the `printf` call inside the `if` block, you are using Chinese quotation marks `（"1"）` instead of standard ASCII parentheses and quotes. This will cause a syntax error.