字符转换常用函数总结

1. 字符串16进制字符

     AsicConvert(string,char);

//ASIC字符转十六进制函数
unsigned char AsicConvert (unsigned char i, unsigned char j)
{
switch (i) 
{               
case 0x30:return (j=0x00);break; 
case 0x31:return (j=0x01);break; 
case 0x32:return (j=0x02);break; 
case 0x33:return (j=0x03);break; 
case 0x34:return (j=0x04);break; 
case 0x35:return (j=0x05);break; 
case 0x36:return (j=0x06);break; 
case 0x37:return (j=0x07);break; 
case 0x38:return (j=0x08);break; 
case 0x39:return (j=0x09);break; 
case 0x41:
case 0x61:return (j=0x0A);break;
case 0x42:
case 0x62:return (j=0x0B);break; 
case 0x43:
case 0x63:return (j=0x0C);break; 
case 0x44:
case 0x64:return (j=0x0d);break;
case 0x45:
case 0x65:return (j=0x0e);break; 
case 0x46:
case 0x66:return (j=0x0f);break;
case 0x20:return (' ');break; 
default: return(j=0x10);break;
}
}

     例：编辑框中TEST中输入字符B5，按十六进制0xB5，将值赋给输出变量outdata;

     cstring sFind;

     GetDlgItemText(IDC_EDIT_TEST, sFind);

     unsigned char s1 = '1';
     unsigned char s2 = '1';
     unsigned char c1 = '1';
     unsigned char c2 = '1';

     s1 = sreadAdr.GetAt(0);
     s2 = sreadAdr.GetAt(1);
     c1 = AsicConvert(s1,c1);
     c2 = AsicConvert(s2,c2);

     unsigned char outdata;

     outdata = (c1<<4) | c2;

2. 字符串转10进制函数

     int ChangeNum (CString str, int length)

  int ChangeNum (CString str, int length)
{
char  revstr[16]={0};  
int   num[16]={0};  
int   count=1;  
int   result=0;  
strcpy_s(revstr,str);  
for   (int i=length-1;i>=0;i--)  
{  
if ((revstr[i]>='0') && (revstr[i]<='9'))  
num[i]=revstr[i]-48;//字符0的ASCII值为48
else if ((revstr[i]>='a') && (revstr[i]<='f'))  
num[i]=revstr[i]-'a'+10;  
else if ((revstr[i]>='A') && (revstr[i]<='F'))  
num[i]=revstr[i]-'A'+10;  
else  
num[i]=0;
result=result+num[i]*count;  
count=count*16;  
}  
return result;
}

3. 字符串转char型

CString to char *

strcpy(char,CString,sizeof(char));

https://www.cnblogs.com/bluestorm/p/3168720.html

自己写的函数：

     char* EditDataCvtChar (CString strCnv,  char * charRec)

//从编辑框取值转char型
 char* EditDataCvtChar (CString strCnv,  char * charRec)
{
//从RowNum编辑框取值
// CString RNum;
char * BSNum;
// unsigned char * BANum;
int CNumByte;
unsigned char k=0;
int i,j=0;


CNumByte=strCnv.GetLength();
BSNum = new char [CNumByte];
charRec = new char [CNumByte];


BSNum = (char*)(LPCSTR)strCnv;


for(i=0;i<(CNumByte/2);i++)
{
charRec[i] = (AsicConvert(BSNum[j],k)<<4) | AsicConvert(BSNum[j+1],k);
j += 2;
}

return charRec;
}

4. 字符串转浮点型方法：

CString sData;
float fData;
unsigned char * hData;

// send zone 0 data
OperDlgFlag = OPEREADSTATUS;


GetDlgItemText(IDC_EDIT_OPE_KP0,sData);//取KP zone0 编辑框中的数据


fData = (float)atof(sData);//将编辑框中的浮点字符串转成十六进制
hData = (unsigned char *)&fData;
OperBuf[0] = hData[0];
OperBuf[1] = hData[1];
OperBuf[2] = hData[2];
OperBuf[3] = hData[3];