数据类型转换

链接

参考链接: link.

代码

// An highlighted block
template<class T>
void ConvertT2Byte(T dou, unsigned char* temp)
{
	unsigned char* pdata = (unsigned char *)&dou;
	int sizeofT = sizeof(dou);
	switch (sizeofT)
	{
	case 4:
		for (int i = 0; i < 4; i++)
		{
			temp[i] = *pdata++;
		}
		break;
	case 8:
		for (int i = 0; i < 8; i++)
		{
			temp[i] = *pdata++;
		}
		break;
	default:
		break;
	}
}
template<class T>
T ConvertByte2T(unsigned char *temp)
{
	T CurrentReceiveData = 0;
	void *pf;
	pf = &CurrentReceiveData;
	unsigned char * px;
	px = (unsigned char *)temp;
	int sizeofT = sizeof(CurrentReceiveData);
	switch (sizeofT)
	{
	case 4:
		for (int j = 0; j < 4; j++)
		{
			*((unsigned char *)pf + j) = *(px + j);
		}
		break;
	case 8:
		for (int j = 0; j < 8; j++)
		{
			*((unsigned char *)pf + j) = *(px + j);
		}
		break;
	default:
		break;
	}
	return CurrentReceiveData;
}
int main()
{
	double dou = 101123.456894;
	unsigned char temp1[8];
	ConvertT2Byte<double>(dou,temp1);
	double re = ConvertByte2T<double>(temp1);
	cout << std::fixed;
	cout << re << endl;

	float flo = 101123.456894;
	unsigned char flotemp[8];
	ConvertT2Byte(flo, flotemp);
	float fl = ConvertByte2T<float>(flotemp);
	cout << fl << endl;

	int in = 1243;
	unsigned char inttemp[4];
	ConvertT2Byte(in,inttemp);
	int inre = ConvertByte2T<int>(inttemp);
	cout << inre << endl;
	cout << endl;
	cout << endl;
	}