byte与string之间的相互转换
实现unsigned char 数组与string之间的相互转换
1: #include <iostream>
2: #include <string>
3: #include <stdlib.h>
4:
5: using namespace std;
6: typedef unsigned char byte;
7:
8: ////-------------------------------------------
9: //// 将字符串类型转换为BYTE数组
10: ////-------------------------------------------
11: byte * HexStrToByte(string str_arr, byte byte_arr[])
12: {
13: unsigned char ch1;
14: unsigned char ch2;
15: byte mybyte[str_arr.length() / 2];
16: int k = 0;
17: for (int i=0; i<str_arr.length(); i = i+2)
18: {
19: ch1 = str_arr.at(i);
20: ch2 = str_arr.at(i+1);
21: if (ch1>=48 && ch1 <= 57)
22: {
23: ch1 &= 0x0F;
24: }
25: if (ch1>='A' && ch1 <='F')
26: {
27: ch1 &= 0x0F;
28: ch1 += 0x09;
29: }
30: if (ch2 >= 48 && ch2 <= 57)
31: {
32: ch2 &= 0x0F;
33: }
34: if (ch2>='A' && ch2 <='F')
35: {
36: ch2 &= 0x0F;
37: ch2 += 0x09;
38: }
39: ch1<<=4;
40: byte_arr[k] =(byte)(ch1 + ch2);//int类型转byte类型，有问题
41: mybyte[k] = (byte)(ch1 + ch2);
42:
43: k++;
44: }
45: return mybyte;
46: }
47:
48: ////-------------------------------------------
49: //// 将BYTE数组转换为字符串类型
50: ////-------------------------------------------
51: string* byteToHexStr(byte byte_arr[], int arr_len)
52: {
53: string* hexstr = new string;
54: for(int i=0; i<arr_len; i++)
55: {
56: char hex1;
57: char hex2;
58: int value = byte_arr[i];
59: int v1 = value/16;
60: int v2 = value % 16;
61: //将商转换为字母
62: if (v1>=0 && v1<=9)
63: {
64: hex1 = (char)(48 + v1);
65: }
66: else
67: {
68: hex1 = (char)(55 + v1);
69: }
70: //将余数转成字母
71: if (v2>=0 && v2<=9)
72: {
73: hex2 = (char)(48 + v2);
74: }
75: else
76: {
77: hex2 = (char)(55 + v2);
78: }
79: //将字母连成一串
80: *hexstr = *hexstr + hex1 + hex2;
81: }
82: return hexstr;
83: }
84:
85: int main()
86: {
87: int size = 128;
88: byte temp[size];
89: int len = sizeof(temp) / sizeof(byte);
90: cout << "The length is : " << len << endl;
91: cout << "The temp is : " << temp << endl << endl;
92: cout << "-------------------" << endl;
93:
94: for(int i = 0; i < len; i++)
95: {
96: temp[i] = i+1;
97: }
98:
99: cout << temp << endl;
100: cout << "----------------------" << endl;
101: byte test[] = {0x01, 0x01, 0x02, 0xe4, 0x71, 0x2b, 0x5f, 0x30};
102: cout << test << endl;
103: for(int i = 0; i < 8; i++)
104: cout << test[i] << " ";
105: cout << endl;
106: cout << "----------------------" << endl;
107:
108:
109: byte b[]={104,1,2,3,4,5,6,104,81,0,10,6,10,17,10,0,6,10,17,10,0,150,22};
110: //string s=System.Text.Encoding.Default.GetString(b);
111: int size1 = sizeof(b) / sizeof(byte);
112: string str = * byteToHexStr(b, size1);
113:
114: cout << "The string length is : " << str.length() << endl;
115: cout << "The byte length is : " << sizeof(b)/sizeof(byte) << endl;
116: cout << "The string is : " << str << endl;
117:
118: byte bs[size];
119: byte * bs2 = HexStrToByte(str, bs);
120: for(int i = 0; i < 23; i++)
121: cout << (int) bs[i] ;
122: cout << endl;
123:
124: //byte bs[]=System.Text.Encoding.Default.GetBytes(s);
125: if(b == bs2)
126: cout << "The two byte are the same!" << endl;
127: else cout << "The two byte are not the same!" << endl;
128:
129:
130: return 0;
131: }