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This noncompliant code depends on implementation-defined behavior. It prints either -1 or 255, depending on whether a plain int bit-field is signed or unsigned.
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struct {
int a: 8;
} bits = {255};
int main(void) {
printf("bits.a = %d.\n", bits.a);
return 0;
}
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This compliant solution uses an unsigned int bit-field and does not depend on implementation-defined behavior.
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struct {
unsigned int a: 8;
} bits = {255};
int main(void) {
printf("bits.a = %d.\n", bits.a);
return 0;
}
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