编辑代码

#include <stdio.h>
typedef union {
    struct
    {
        unsigned char a;
        unsigned char b;
    };
    struct{
        unsigned char a1:1;
        unsigned char a2:7;
        unsigned char a3:8;
    }acb;
}xx;
xx xxj;
int main () {
    //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。
    int y;
    xxj.acb.a3=1; 
    xxj.acb.a1=0;
    printf("Hello world!     - c.jsrun.net.%d,%d",xxj.b,xxj.acb.a1);
    return 0;
}