Page 130 - 6437
P. 130
unsigned int heightValidated;
} status1;
/* define a structure with bit fields */
struct
{
unsigned int widthValidated : 1;
unsigned int heightValidated : 1;
} status2;
int main( )
{
printf( "Memory size occupied by status1 : %d\n", sizeof(status1));
printf( "Memory size occupied by status2 : %d\n", sizeof(status2));
return 0;
}
When the above code is compiled and executed, it produces the following result:
Memory size occupied by status1 : 8
Memory size occupied by status2 : 4
Bit Field Declaration
The declaration of a bit-field has the following form inside a structure:
struct
{
type [member_name] : width ;
};
The following table describes the variable elements of a bit field:
Elements Description
type An integer type that determines how a bit-field's value is
133
