#include "stdlib.h"
#include "iostream.h"

struct towar {
int id;
char nazwa[255];
float cena;
float ilosc;       
} ;

float suma(towar *t1, towar *t2) {
      if(t1 -> id == t2 -> id) { //to samo co (*t1).id == (*t2).id;
      t1 -> ilosc += t2 -> ilosc; //to samo co (*t1).ilosc += (*t2).ilosc;
      return 1;         
      }
      else {
      return 0;     
      }
}

int main() {
towar *ptrT1 = 0;
ptrT1 = (towar *) malloc(sizeof(towar));
    
towar t1 = {1, "Maslo", 2.80, 500};
towar t2 = {1, "Maslo", 2.80, 300};
cout << suma(&t1, &t2) << " " << t1.ilosc << endl;
system("pause");
}