第一个

#define PB(X) printf((X)?"1":"0")

#define UI unsigned int

struct byte

{ UI a0:1;UI a1:1; UI a2:1; UI a3:1; UI a4:1; UI a5:1; UI a6;

UI a7;};

union bits{char ch;struct byte bit;};

void decode(union bits c);

main()

{char c; union bit asc;

for(c='A';c<'C';c++)

{asc.ch=c;

printf("%o:",c);

decode(asc);
    }

}

void decode(union bits b)

{PB(b.bit.a7);PB(b.bit.a6);PB(b.bit.a5);PB(b.bit.a4);PB(b.bit.a3);PB(b.bit.a2);PB(b.bit.a1);PB(b.bit.a1);

printf("\n");

}



第二个

struct bit

{unsigned bund_bit:2;

 unsigned char_bit:2;

 unsigned pari_bit:1;

 unsigned even_bit:1;

 unsigned stop_bit:2;

 unsigned dummybit:8;

};

main()

{unsigned int *pmodword;

struct bit mod;

mod.bund_bit=input("bund bit(0-3)");
mod.char_bit=input("bund bit(0-3)");
mod.pari_bit=input("bund bit(0,1)");
mod.even_bit=input("bund bit(0,1)");
mod.stop_bit=input("bund bit(0-3)");

mod.dummybit=0;
pmodword=(unsigned int *)&mod;

printf(\n The mode word is %x\n",*pmodword);

}

input(s)

char *s;

{int bits;

printf("Enter %s:",s);

scanf("%d",&bits);

return(bits);

}

越详细越好啊


[ 本帖最后由 miracleyyf 于 2010-3-24 16:44 编辑 ]