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BITFIELD.C
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1994-05-15
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/* Chapter 11 - Program 7 - BITFIELD.C */
#include "stdio.h"
union {
int index;
struct {
unsigned int x : 1;
unsigned int y : 2;
unsigned int z : 2;
} bits;
} number;
void main()
{
for (number.index = 0 ; number.index < 20 ; number.index++) {
printf("index = %3d, bits = %3d%3d%3d\n", number.index,
number.bits.z, number.bits.y, number.bits.x);
}
}
/* Result of execution
index = 0, bits = 0 0 0
index = 1, bits = 0 0 1
index = 2, bits = 0 1 0
index = 3, bits = 0 1 1
index = 4, bits = 0 2 0
index = 5, bits = 0 2 1
index = 6, bits = 0 3 0
index = 7, bits = 0 3 1
index = 8, bits = 1 0 0
index = 9, bits = 1 0 1
index = 10, bits = 1 1 0
index = 11, bits = 1 1 1
index = 12, bits = 1 2 0
index = 13, bits = 1 2 1
index = 14, bits = 1 3 0
index = 15, bits = 1 3 1
index = 16, bits = 2 0 0
index = 17, bits = 2 0 1
index = 18, bits = 2 1 0
index = 19, bits = 2 1 1
*/