program 5

unsigned char a,b;a=0;scanf("%d",&b);b=b&a;printf("%d\n",b);}main(){int i,j,bit;unsigned int mask;mask=0x8000;printf("Please input a number:");scanf("%d",&i);printf("the higher 8 bits of %d is",i);for(j=0;j<16;j++){bit=(mask & i)?1:0;printf("%d",bit);if(j==7)printf("\nthe lower 8 bits of %d is:",i);mask>>=1;}/*void check(int num){ unsigned int mask; mask=0x8000;if((mask&num)==0) printf("zhengshu.\n"); elseprintf("fushu.\n");}main(){int a;scanf("%d",&a);check(a);}*//*int Getdouble(int num){ unsigned int mask;int i,bit,rtn;mask=0x8000;printf("Primary data is:");for(i=0;i<16;i++){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;}printf("\n Now data is:");mask=0x8000;for(i=0;i<16;i++){if(i%2==0){bit=0;printf("%d",bit);}else{bit=(mask&num)?1:0;printf("%d",bit);}rtn=(rtn<<1)|bit;//rtn=(rtn<<1)^bit;此处两者等效，因为rtn的最后一位始终是0，bit为1时，得1；bit为0时，得0.mask>>=1;}printf("\n");return rtn;}main(){int n,m;scanf("%d",&n);m=Getdouble(n);printf("%d\n",m);} *//*int low4to1(int num){int i,bit,rtn;unsigned int mask;mask=0x8000;printf("Primary data:\n"); for(i=0;i<16;i++){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;}printf("\nModified data:\n"); mask=0x8000;for(i=0;i<16;i++){if(i<12){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;}else{bit=1;printf("%d",bit);}rtn=(rtn<<1)|bit;//rtn=(rtn<<1)^bit;此处两者等效，因为rtn的最后一位始终是0，bit为1时，得1；bit为0时，得0.}printf("\n",rtn);return rtn;}main(){int n;scanf("%d",&n);printf("%d\n",low4to1(n));}*//*int right_mobile(int num){ int n,m,i,bit,rtn;unsigned int mask;mask=0x8000;printf("Primary data:\n"); for(i=0;i<16;i++){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;}m=num>>4;n=num<<12;rtn=n|m;mask=0x8000;printf("\nModified data:\n"); for(i=0;i<16;i++){bit=(mask&rtn)?1:0;printf("%d",bit);mask>>=1;}printf("\n");return rtn;}main(){int n;scanf("%d",&n);printf("%d\n",Fanzhuan4(n)); } *//*main(){int a;scanf("%d",&a);printf("%d",a^0);}void swap(int x,int y){printf("x=%d,y=%d\n",x,y); x=x^y;y=x^y;x=x^y;printf("x=%d,y=%d\n",x,y); }main(){int m,n;swap(m,n);}void swap(int *p1,int *p2){*p1=*p1^*p2;*p2=*p1^*p2;*p1=*p1^*p2;}main(){int m,n;scanf("%d,%d",&m,&n);printf("Primary data:m=%d,n=%d\n",m,n);swap(&m,&n);printf("After swapping data:m=%d,n=%d\n",m,n); }int Mos(int x){x=x&(~1);return x;}main(){int m;scanf("%d",&m);}int left_mobile(int k){int m,n,rtn;int i,bit;unsigned int mask; mask=0x8000;printf("Primary data:\n"); for(i=0;i<16;i++){bit=(k&mask)?1:0;printf("%d",bit);mask>>=1;}m=k>>12;n=k<<4;rtn=m|n;mask=0x8000;printf("\nModified data:\n"); for(i=0;i<16;i++){bit=(mask&rtn)?1:0;printf("%d",bit);mask>>=1;}printf("\n");return rtn;}main(){unsigned int k;scanf("%x",&k);printf("%x\n",left_mobile(k)); } *//*int Reverse4to1(int k){int bit,i,bit1,rtn=0;unsigned int mask,ds;ds=mask=0x8000;printf("Primary data:\n");for(i=0;i<16;i++){bit=(mask&k)?1:0;printf("%d",bit);mask>>=1;}printf("\n");mask=0x8000;for(i=0;i<14;i++){if(i<12){bit=(mask&k)?1:0; mask>>=1;rtn=(rtn<<1)|bit;}if(i==12){bit=(mask&k)?1:0;bit1=((mask>>3)&k)?1:0; rtn=(rtn<<1)|bit1;rtn=(rtn<<3)|bit;}if(i==13){bit=((mask>>1)&k)?1:0; bit1=((mask>>2)&k)?1:0; rtn=rtn|(bit1<<2);rtn=rtn|(bit<<1);}}return rtn;}main(){int m;int bit,i;unsigned int mask;mask=0x8000;scanf("%d",&m);m=Reverse4to1(m); printf("Modified data:\n"); for(i=0;i<16;i++){bit=(mask&m)?1:0;printf("%d",bit); mask>>=1;}printf("\n%d\n",m);} *//*struct packet_data{ unsigned int a:5;unsigned int :0;};struct packet_data Gethighest6(int num){ unsigned int mask;struct packet_data pd;int i,bit;mask=0x8000;printf("Primary data:");for(i=0;i<16;i++){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;}mask=0x8000;printf("\nGot data:");for(i=0;i<6;i++){bit=(mask&num)?1:0;printf("%d",bit);mask>>=1;pd.a=(pd.a<<1)|bit;}printf("\n");return pd;}main(){int n;struct packet_data pad; scanf("%d",&n);pad=Gethighest6(n); printf("%d\n",pad.a);}*//*main(){unsigned char a; unsigned int mask;int i,bit,rtn=0;scanf("%d",&a);mask=0x80;printf("Primary data:");for(i=0;i<8;i++){bit=(mask&a)?1:0;printf("%d",bit); mask>>=1;}printf("\nModified data:"); mask=0x80;for(i=0;i<8;i++){if(i==4||i==6)bit=1;elseif(i==5||i==7)bit=0;elsebit=(mask&a)?1:0; mask>>=1;printf("%d",bit);rtn=(rtn<<1)|bit;}printf("\n%d\n",rtn);}*//*struct packet_data{ unsigned int :4;unsigned int b:4;};main(){struct packet_data B; unsigned int mask;int bit,i;unsigned char a;scanf("%d",&a);mask=0x80;B.b=10;printf("Primary data:"); for(i=0;i<8;i++){bit=(mask&a)?1:0;printf("%d",bit); mask>>=1;}a=((a>>4)<<4)|B.b; mask=0x80;printf("\nModified data:"); for(i=0;i<8;i++){bit=(mask&a)?1:0;printf("%d",bit);mask>>=1;}printf("\n%d\n",a);} *//*注意程序中输入bit【i】.a是不能用scanf();因为scanf();的格式要求用地址，虽然对位段结构体可以用地址或指针传递，但是对每个具体位段a不能用地址；另外，数值数据在计算机中以补码的形式存储.struct packet_data{unsigned int a:1;unsigned int :7;};void print_Buma(struct packet_data bit[16]){int n=0;unsigned int mask;int i;printf("\nPrimary binary data:");for(i=0;i<16;i++){printf("%d",bit[i].a);}if(bit[0].a==0){printf("\nModified data:");for(i=0;i<16;i++){printf("%d",bit[i].a);n=(n<<1)|bit[i].a;}printf("\nPrimary int data is: %d.",n); }if(bit[0].a==1){for(i=1;i<16;i++){n=(n<<1)|bit[i].a;}n=-n;printf("\nPrimary int data is: %d.",n); mask=0x8000;printf("\nModified data:");for(i=0;i<16;i++){bit[i].a=(mask&n)?1:0;printf("%d",bit[i].a);mask>>=1;}}printf("\n");}main(){struct packet_data bit[16];int i;char numstr[2];printf("Please input sixteen 1 or 0:\n");for(i=0;i<16;i++){bit[i].a=atoi(gets(numstr));}print_Buma(bit);} *//*其实也可以这样int bit【16把bit【16】数组定义为整型数组，操作类似，没有什么区别，只是输入原码是可以用scanf();来输入，因为此时整型元素可以用地址或指针读取了。