總結一下剛剛寫的程式中的C++各種型別的轉換string,QString,char*, BYTE等等
阿新 • • 發佈:2019-02-08
由於我採用Qt來寫的介面,所以用到了QString型別
1. QString和string的相互轉換
[cpp] view plaincopyprint?- //------------------------
- // QString and string change
- //------------------------
- QString s2q(const string &s)
- {
- return QString(QString::fromLocal8Bit(s.c_str()));
- }
- string q2s(const QString &s)
- {
- return string((
- }
2. QString to Char*
- QString data;
- data.toLatin1().data();
3. char to number
[cpp] view plaincopyprint?- int char2num(char ch)
- {
- if(ch>='0'&&ch<='9')return ch-'0';
- elseif(ch>='a'&&ch<='f')return ch-'a'+10;
- return
- }
4. number to QString
[css] view plaincopyprint?- QString::number(number,10);//10表示的是進位制,如是16進位制,則改為16
5. uint8_t to QString
[cpp] view plaincopyprint?- uint8_t Message_Digest;
- QString::number(Message_Digest,16);
6. BYTE* to char[] to QString
[cpp] view plaincopyprint?- QString textshow = NULL;
- BYTE * output = newBYTE[1024];
- for(int i=0; i<16; i++)
- {
- char pBuff[2];
- sprintf(pBuff,"%02x",output[i]);
- textshow = textshow + pBuff;
- }
7. string to BYTE [] //其中#define unsigned char BYTE
[cpp] view plaincopyprint?- ////-------------------------------------------
- //// 將字串型別轉換為BYTE陣列
- ////-------------------------------------------
- void CryptClient::HexStrToByte(string str_arr, BYTE byte_arr[24])
- {
- unsigned char ch1;
- unsigned char ch2;
- int k = 0;
- for (int i=0; i<str_arr.length()-1; i = i+2)
- {
- ch1 = str_arr.at(i);
- ch2 = str_arr.at(i+1);
- if (ch1>=48 && ch1 <= 57)
- {
- ch1 &= 0x0F;
- }
- if (ch1>='A' && ch1 <='F')
- {
- ch1 &= 0x0F;
- ch1 += 0x09;
- }
- if (ch2 >= 48 && ch2 <= 57)
- {
- ch2 &= 0x0F;
- }
- if (ch2>='A' && ch2 <='F')
- {
- ch2 &= 0x0F;
- ch2 += 0x09;
- }
- ch1<<=4;
- byte_arr[k] = ch1 + ch2;//int型別轉byte型別,有問題
- k++;
- }
- }
8. BYTE[] to string //上個過程的逆過程
[c-sharp] view plaincopyprint?- ////-------------------------------------------
- //// 將BYTE陣列轉換為字串型別
- ////-------------------------------------------
- string* byteToHexStr(BYTE byte_arr[], int arr_len)
- {
- string* hexstr = newstring;
- for(int i=0; i<arr_len; i++)
- {
- char hex1;
- char hex2;
- int value = byte_arr[i];
- int v1 = value/16;
- int v2 = value % 16;
- //將商轉換為字母
- if (v1>=0 && v1<=9)
- {
- hex1 = (char)(48 + v1);
- }
- else
- {
- hex1 = (char)(55 + v1);
- }
- //將餘數轉成字母
- if (v2>=0 && v2<=9)
- {
- hex2 = (char)(48 + v2);
- }
- else
- {
- hex2 = (char)(55 + v2);
- }
- //將字母連成一串
- *hexstr = *hexstr + hex1 + hex2;
- }
- return hexstr;
- }
9. char* to QString
[cpp] view plaincopyprint?- QString keyall1;
- char keych1[MAX_NUM];
- keyall1 = QString(QLatin1String(keych1));
嗯,基本上程式中就用到了這麼多,寫出來,留著以後自己參考,要是有人能用到,那就更好啦~~~~~~~~