【C++】将无符号char数组转为字符串（char*）

input:  unsigned char src[6] = {0x12, 0x32,0x56,0x78,0x90,0xab}
output：char[12] = {"1232567890ab"}

#include 
#include 

using namespace std;

typedef unsigned char BYTE;

//封装成函数
char* ByteOutputByChar(BYTE byData[], int _exdataLen) {
    char* temp = (char*)malloc(sizeof(BYTE));
    memset(temp, 0, sizeof(BYTE));

    char* str = (char*)malloc(_exdataLen * sizeof(BYTE));
    memset(str, 0, _exdataLen * sizeof(BYTE));

    for (int i = 0; i < _exdataLen; i++) 
    {
        sprintf_s(temp, 1024, "%02x", byData[i]);
        strcat_s(str, 1024, temp);
        memset(temp, 0, sizeof(BYTE));
    }
    return str;
}

int main()
{
    BYTE exData[6] = {0x12, 0x32,0x56,0x78,0x90,0xab};
    
    char* temp = (char*)malloc(sizeof(BYTE));
    memset(temp, 0, sizeof(BYTE));
    char* str = (char*)malloc(3*sizeof(BYTE));
    memset(str, 0, 6*sizeof(BYTE));

    for (int i = 0; i < sizeof(exData); i++) 
    {
        sprintf_s(temp, 32, "%02x", exData[i]);
        strcat_s(str, 32,temp);
        memset(temp, 0, sizeof(BYTE));
    }
    
    //mian函数内部处理输出
    cout << str << endl;
    //调用自定义函数ByteOutputByChar输出
    char* str1 = ByteOutputByChar(exData, 6);
    cout << str1 << endl;

    system("PAUSE ");
    return 0;
}