C语言学习（四）

 1 /************************************************************************/
 2 /* 功能：实现二进制数X的转化，p为转化位数，n为转化长度。例x=0b0001 0001,p=4,n=3转换后x=0b0110 0001
 3 /* 作者：ZL
 4 /* 日期：2018-04-08   14:38                                                                 
 5 /************************************************************************/
 6 
 7 #include <stdio.h>
 8 
 9 unsigned int convert(unsigned int x,int p,int n);
10 void D_TO_B(unsigned int x);
11 
12 
13 int main(void)
14 {
15     
16    unsigned int x=17;
17    unsigned int y;
18 
19    printf("转换前：");
20    D_TO_B(x);
21    printf("\n");
22 
23    y=convert(x,4,3);
24    printf("转换后：");
25    D_TO_B(y);
26    printf("\n");
27    
28   
29        
30 }
31 
32 
33 unsigned int convert(unsigned int x,int p,int n)
34 {
35     unsigned int Bit=0;
36     unsigned int temp=1;
37     int i=0;
38 
39     for (i=0;i<n;i++)
40     {
41         Bit |=temp;
42         temp<<=1;
43     }
44 
45     Bit=Bit<<p;
46     x ^=Bit;
47     return x;
48 }
49 
50 void D_TO_B(unsigned int x)
51 {
52     int i=0,j=0;
53     if (x==0)
54     {
55        return;
56     }
57     else
58     {
59       i=x%2;
60       j=x/2;
61       D_TO_B(j);
62       printf("%d",i);
63     }
64 }