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Editorial Team
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Asked: 2026-06-01T15:40:09+00:00

I compiled this (gcc compiler): #include <stdio.h> main() { struct { a:1; b:2; }

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I compiled this (gcc compiler):

#include <stdio.h>

main() {

    struct {
        a:1;
        b:2;
    } t;

    t.b=6;
    t.a=2;
    printf("%d %d",t.a,t.b);
}

Error shown was:

expected specifier-qualifier list before ‘a’

Why it is needed when unnamed data variables are taken as int by default. Please explain…

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1 Answer

  1. Editorial Team

    This is required by the C language standard. According to section 6.7.2.1 part 4:

    A bit-field shall have a type that is a qualified or unqualified version of _Bool, signed int, unsigned int, or some other implementation-defined type.

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