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  vc代碼
注意：在linux下是沒有 ltoa這個函數，因此在linux下可用這樣來實現：
用sprintf格式化字符串,%x(16進制),%o(8進制),%u(無符號十進制)； 字符串轉數字可用strtol來實現，這個函數第三個形參 代表采用的進制方式，如base值為10則采用10進制;
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <locale.h>
5 int main() {
6 int i,v;
7 char bs[33];
8 char b[33];
9 char hs[9];
10 char h[9];
11 char s[4];
12 char *e;
13
14 // 十進制整數轉二進制串；
15 i=1024;
16 ltoa(i,b,2);
17 sprintf(bs,"%032s",b);
18 printf("i=%d,bs=%s\n",i,bs);
19 // 十進制整數轉十六進制串；
20 i=1024;
21 ltoa(i,h,16);
22 sprintf(hs,"%08s",h);
23 printf("i=%d,hs=%s\n",i,hs);
24 // 十六進制字符串轉成十進制數
25 strcpy(hs,"00000400");
26 sscanf(hs,"%x",&i);
27 printf("hs=%s,i=%d\n",hs,i);
28 // 二進制字符串轉化為十六進制字符串；
29 strcpy(bs,"00000000000000000000010000000000");
30 i=strtol(bs,&e,2);
31 ltoa(i,h,16);
32 sprintf(hs,"%08s",h);
33 printf("bs=%s,hs=%s\n",bs,hs);
34 // 二進制字符串轉化為十進制數；
35 strcpy(bs,"00000000000000000000010000000000");
36 i=strtol(bs,&e,2);
37 printf("bs=%s,i=%d\n",bs,i);
38 // 十六進制字符串轉成二進制串
39 strcpy(hs,"00000400");
40 sscanf(hs,"%x",&i);
41 ltoa(i,b,2);
42 sprintf(bs,"%032s",b);
43 printf("hs=%s,bs=%s\n",hs,bs);
44 // ASC\GBK字符串轉十六進制串
45 strcpy(s,"a漢");
46 i=0;
47 while (1) {
48 if (0==s[i]) break;
49 sprintf(hs+i*2,"%02X",(unsigned char)s[i]);
50 i++;
51 }
52 setlocale(LC_ALL,"chs");
53 printf("s=%s,hs=%s\n",s,hs);
54 // 十六進制字符串轉成漢字（GBK）及字符(ASC)
55 strcpy(hs,"61BABA");
56 i=0;
57 while (1) {
58 if (1!=sscanf(hs+i*2,"%2x",&v)) break;
59 s[i]=(char)v;
60 i++;
61 }
62 s[i]=0;
63 printf("hs=%s,s=%s\n",hs,s);
64
65 return 0;
66
67
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