C语言char*字符串数组和unsigned char[]数组的相互转换

#include 
#include 
using namespace std;

void convertUnCharToStr(char* str, unsigned char* UnChar, int ucLen)
{
	int i = 0;
	for(i = 0; i < ucLen; i++)
	{
		//格式化输str,每unsigned char 转换字符占两位置%x写输%X写输
		sprintf(str + i * 2, "%02x", UnChar[i]);
	}
}

void convertStrToUnChar(char* str, unsigned char* UnChar)
{
	int i = strlen(str), j = 0, counter = 0;
	char c[2];
	unsigned int bytes[2];

	for (j = 0; j < i; j += 2) 
	{
		if(0 == j % 2)
		{
			c[0] = str[j];
			c[1] = str[j + 1];
			sscanf(c, "%02x" , &bytes[0]);
			UnChar[counter] = bytes[0];
			counter++;
		}
	}
	return;
}

int main()
{
	unsigned char src[6] = {0x12, 0x32,0x56,0x78,0x90,0xab};
	char buffer[20];//维数定义些
	convertUnCharToStr(buffer, src, 6);  
	printf("%s\n", buffer);


	unsigned char dst[6];
	int len = strlen(buffer);
	cout << len << endl;
	convertStrToUnChar(buffer, dst);
	
	int i = 0;
	for(i = 0; i < 6; i++)
	{
		printf("%x ", dst[i]);
	}
	cout << endl;


	return 0;
}