c++ - No matching function for call to classname::constructor -

this question has answer here:

• no matching function call “standard constructor” 4 answers

class transport{ private:     int weight; // member variable (private)     int capacity; // member variable (private)     int speed; // member variable (private) public:     transport(int aweight, int acapacity, int aspeed) { // default constructor         if(aweight > 0) { // perform validation @ time of creating object             weight = aweight;         } else {             weight = 0;         }          if(acapacity > 0) { // perform validation @ time of creating object             capacity = acapacity;         } else {             capacity = 0;         }          if(aspeed > 0) { // perform validation @ time of creating object             speed = aspeed;         } else {             speed = 0;         }     }     void carrygoods(); // member function (public) -> each transport has carrying goods functionality.  };  class landtransport : public transport{ // inherit transport class private:     char * transportationmode; // member variable (private)     char * vehicletype; // member variable (private) public:     landtransport(char * atransporationmode, char * avehicletype) {         transportationmode = new char[strlen(atransporationmode)+1];         strcpy(transportationmode, atransporationmode);          vehicletype = new char[strlen(avehicletype)+1];         strcpy(vehicletype, avehicletype);     } }; 

can please describe, wrong here , best practice?

your derived class has constructor doesn't provide parameters of parent's constructor.

landtransport(char * atransporationmode, char * avehicletype) 

should below (for example):

landtransport(char * atransporationmode, char * avehicletype) : transport(0,0,0)                                                               ^^^^^^^^^^^^^^^^^^