1 #include <stdio.h>
2 
3 int foo(char c) { return 1; }
4 int foo(signed char c) { return 2; }
5 int foo(unsigned char c) { return 3; }
6 
7 int main() {
8   char c = 0;
9   signed char sc = 0;
10   unsigned char uc = 0;
11   printf("%d %d %d\n", foo(c), foo(sc), foo(uc));
12   return 0; // Break here
13 }
14