c++ - stoi causes out of range error -


i have code gives me error terminating uncaught exception of type std::out_of_range: stoi: out of range

which have identified being caused line long ascii = std::stoi(temp_string);

what way i'm using stoi causing , how can fix it?

std::string encode(std::string message){ std::string num_value; long cipher; if(message.length() < 20){   for(int = 0; < message.length(); ++i){     int temp = (char) message.at(i);      num_value += std::to_string(temp);    }   return num_value; } else{     int count = 0;        std::string temp_string;     for(int = 0; < message.length(); ++i){       int temp = (int)  message.at(i);       temp_string += std::to_string(temp);                  count++;           if(count == 20){          count = 0;          //add cipher encrypt          long ascii = std::stoi(temp_string);          //cipher = pow(ascii, 10000);          //add n cipther encrypt          //add cipherencrypt + n num_value          //reset temp_string          temp_string += "n";           temp_string = "";         }  } return num_value; }  int main(){   std::string s = "hello world t's name aaaaaaaaaaaaa?";   std::cout<<"encoded value : "<< encode(s)<<std::endl; }

std::stoi returns integer; sounds number large integer. try using std::stol instead (see here).

also if intend code portable (useable different compilers/platforms), keep in mind integers , longs have no standard size. unless minimum size given standard enough, may want @ using intx_t (where x size want), given in cstdint header.


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