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阅读并运行下面的程序，掌握按位运算的规则。

#include "stdio.h"int main(){    char x=040;    printf("%d\n",x=x<<1);    return 0;}

(2)

#include "stdio.h"int main(){    unsigned int a,b;    a=7^3;    b=~4&3;    printf("%d,%d\n",a,b);    return 0;}

(3)

#include "stdio.h"int main(){    char  x=040;    printf("%o\n",x<<1);    return 0;}

(4)

#include "stdio.h"int main(){    char a=0x95,b,c;    b=(a&0xf)<<4;    c=(a&0xf0)>>4;    a=b|c;    printf("%x\n",a);    return 0;}

(5)

#include "stdio.h"int main(){    unsigned char a=2,b=4,c=5,d;    d = a|b;    d &= c;    printf("%d\n",d);    return 0;}

(6)

#include "stdio.h"struct bit{    unsigned  a:2; //这里定义的称之为位域，2代表占一个字节中的2位    unsigned  b:3; //掌握详情，请搜索“位域”    unsigned  c:4;    int i;} data;int main(){    data.b=2, data.a=8;   //因为data.a只占2位，所以赋值为8后，只保存8的后2位，结果为0    printf("%d %d\n",data.a, data.b);    return 0;}