/* integer promotion */ int printf(const char*, ...);#define promote(s) printf(" %ssigned : %s\n", (s) - 100 < 0 ? "  " : "un", #s); int main (void){    struct {        unsigned u3:3;        unsigned u31:31;        unsigned u32:32;        unsigned long ul31:31;        unsigned long ul32:32;        unsigned long long ull31:31;        unsigned long long ull32:32;        unsigned long long ull33:33;        unsigned long long ull64:64;        unsigned char c;    } s = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };     promote(s.u3);    promote(s.u31);    promote(s.u32);    promote(s.ul31);    promote(s.ul32);    promote(s.ull31);    promote(s.ull32);    promote(s.ull33);    promote(s.ull64);    promote(s.c);    printf("\n");     promote((1 ? s.u3 : 1));    promote((1 ? s.u31 : 1));    promote((1 ? s.u32 : 1));    promote((1 ? s.ul31 : 1));    promote((1 ? s.ul32 : 1));    promote((1 ? s.ull31 : 1));    promote((1 ? s.ull32 : 1));    promote((1 ? s.ull33 : 1));    promote((1 ? s.ull64 : 1));    promote((1 ? s.c : 1));    printf("\n");     promote(s.u3 << 1);    promote(s.u31 << 1);    promote(s.u32 << 1);    promote(s.ul31 << 1);    promote(s.ul32 << 1);    promote(s.ull31 << 1);    promote(s.ull32 << 1);    promote(s.ull33 << 1);    promote(s.ull64 << 1);    promote(s.c << 1);    printf("\n");     promote(+s.u3);    promote(+s.u31);    promote(+s.u32);    promote(+s.ul31);    promote(+s.ul32);    promote(+s.ull31);    promote(+s.ull32);    promote(+s.ull33);    promote(+s.ull64);    promote(+s.c);    printf("\n");     promote(-s.u3);    promote(-s.u31);    promote(-s.u32);    promote(-s.ul31);    promote(-s.ul32);    promote(-s.ull31);    promote(-s.ull32);    promote(-s.ull33);    promote(-s.ull64);    promote(-s.c);    printf("\n");     promote(~s.u3);    promote(~s.u31);    promote(~s.u32);    promote(~s.ul31);    promote(~s.ul32);    promote(~s.ull31);    promote(~s.ull32);    promote(~s.ull33);    promote(~s.ull64);    promote(~s.c);    printf("\n");     promote(!s.u3);    promote(!s.u31);    promote(!s.u32);    promote(!s.ul31);    promote(!s.ul32);    promote(!s.ull31);    promote(!s.ull32);    promote(!s.ull33);    promote(!s.ull64);    promote(!s.c);    printf("\n");     promote(+(unsigned)s.u3);    promote(-(unsigned)s.u3);    promote(~(unsigned)s.u3);    promote(!(unsigned)s.u3);     return 0;}