#include <stdio.h>

struct mystruct { int enabled:1; };
int main()
{
  struct mystruct s;
  s.enabled = 1;
  if(s.enabled == 1)
    printf("Is enabledn"); // we think this to print
  else
    printf("Is disabledn");
}

main.cpp: In function 'int main()':
main.cpp:7:15: warning: overflow in conversion from 'int' to 'signed char:1' changes
value from '1' to '-1' [-Woverflow]
s.enabled = 1;
           ^