c++ - Parse unsigned char[] to std::string -

i have problem parsing contents of char[]. contains bytes, can formated ascii stings. last 2 bytes crc. therefore interpret last 2 entries in array in hex string:

std::ostringstream payload; std::ostringstream crc; payload << std::hex; crc << std::hex;  // last 2 bytes crc (int = 0; < this->d_packetlen - 2; i++)   {   payload << static_cast<unsigned>(this->d_packet[i]);       (int j = i; j < this->d_packetlen; i++)        {          crc << static_cast<unsigned>(this->d_packet[j]);        } } std::string payload_result = payload.str(); std::string crc_result = crc.str();  fprintf(d_new_fp, "%s, %s, %d, %d\n", payload_result.c_str(),    crc_result.c_str(), this->d_lqi, this->d_lqi_sample_count); 

this doesn't work, , i'm not sure why is? there easier way cast unsinged chars ascii?

best, marius

this infinite loop:

for (int j = i; j < this->d_packetlen; i++) {    crc << static_cast<unsigned>(this->d_packet[j]); } 

in loop, not incrementing j; instead you're incrementing i. maybe, problem?

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also, way you've described problem, think correct solution this:

for (int = 0; < this->d_packetlen - 2; i++) {   payload << static_cast<unsigned int>(this->d_packet[i]); } (int j = this->d_packetlen - 2; j < this->d_packetlen; j++) {    crc << static_cast<unsigned int>(this->d_packet[j]); } 

that second loop should outside first loop.