C语言使用位字段作为小整数
示例
#include <stdio.h>
int main(void)
{
/* define a small bit-field that can hold values from 0 .. 7 */
struct
{
unsigned int uint3: 3;
} small;
/* extract the right 3 bits from a value */
unsigned int value = 255 - 2; /* Binary 11111101 */
small.uint3 = value; /* Binary 101 */
printf("%d", small.uint3);
/* This is in effect an infinite loop */
for (small.uint3 = 0; small.uint3 < 8; small.uint3++)
{
printf("%d\n", small.uint3);
}
return 0;
}
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