字符串与数字之间的互相转换

std::string i2Str(const int it)
{//数字到字符串
std::ostringstream oss;
oss << it;
return oss.str();
}

int str2int(std::string str)
{//字符串到数字
int data;
std::istringstream iStr(str);
iStr >> data;
return data;
}
BOOL HexToDec( LPCTSTR shex,int& idec )
{ //十六进制字符串到十进制数
int i,mid;
int len = lstrlen( shex );

if( len>8 )
return FALSE;

mid = 0; idec = 0;
for( i=0;i<len;i++ )
{
if( shex[i]>='0'&&shex[i]<='9' )
mid = shex[i]-'0';
else if( shex[i]>='a'&&shex[i]<='f' )
mid = shex[i] -'a' +10;
else if( shex[i]>='A'&&shex[i]<='F' )
mid = shex[i] -'A' +10;
else
return FALSE;

mid <<= ((len-i-1)<<2);
idec |= mid;

}

return TRUE;
}