有符號及無符號位域值的測試

程序如下：

#include <stdio.h>
#include <stdlib.h>
    
struct bitint
{
        int a:2;
        int b:2;
        int c:1;
};
    
int main()
{
        struct bitint test;
        test.a = 1;
        test.b = 3;
        test.c = 1;
        printf("a is %d b is %d c is %d\n", test.a, test.b, test.c);
        return 0;
}

結果為：

v0id@ubuntu:~/test$ ./a.out

a is 1 b is -1 c is -1