c++ - Can't return result from int function -

i making class inherited program in c++. function determane whenever triangle right , calculate area.

here program:

#include <iostream>  using namespace std;  class puncte { public: int x1,y1; int x2,y2; int x3,y3; puncte(int a, int b, int c, int d, int e, int f):x1(a),y1(b),x2(c),y2(d),x3(e),y3(f){} void afisarep() { cout<<x1<<y1<<x2<<y2<<x3<<y3<<endl; } }; class latura { protected: int l1, l2, l3; public:     void latimeal(int a, int b, int c)     {         l1 = a;         l2 = b;         l3 = c;     } }; class triunghi: public latura { public:     int ariatrdr()     {         return l1*l3/2;     } };  int main() { puncte p(2,2,2,2,2,2); latura l; l.latimeal(1,2,4); triunghi t; if (p.x1 == p.x3 && p.y1 == p.y2) {     cout << "triunghi dreptunghic!" << endl;     cout << t.ariatrdr() << endl; }  return (0); } 

everthing working fine doesnt show correct result adress , dont know how fix it.

this result.

triunghi dreptunghic! 513242112 

you calling l.latimeal(1,2,4); on object l.

the object t created triunghi t;. not initialized calling latimeal function. therefore getting undefined value.

you need cal t.latimeal(1,2,4) function initialize it, after creating object.