struct

[acerr]

Lekce 6\06_06.cpp||In function 'int main()':|
\Lekce 6\06_06.cpp|32|error: invalid array assignment|
||=== Build finished: 1 errors, 0 warnings ===|

#include <iostream>
struct prehled
{
    char name[200];
    int suma;
};

int main()
{
    using namespace std;
    int darci;
    cout << "Zadejte pocet darcu: ";
    cin >> darci;
    prehled * pt = new  prehled [darci];
    for (int i = 0; i <darci;i++)
    {
        cout << "\nZadejte jmeno: ";
        cin >> pt[i].name;
        cout << "Zadejte sumu: ";
        cin >> pt[i].suma;
    }

    prehled * lv = new prehled [darci]; // lv = low volume
    int pocitadlo = 0;
    cout << "Velci darci: ";

    for (int n = 0; n <darci; n++)
    {
        if (pt[n].suma < 10000)
        {
            lv[pocitadlo].suma = pt[n].suma;
            lv[pocitadlo].name = pt[n].name;
            pocitadlo++;
        }
        else
        {
            cout << "\n\nJmeno: " << pt[n].name;
            cout << "\nSuma: " << pt[n].suma;
        }

    }

    delete [] pt;

    cout << "Mali darci:";
    pocitadlo = 0;
   for (int a = 0; a<pocitadlo;a++)
    {
        cout << "\nJmeno: " << lv[pocitadlo].name;
        cout << "Suma: " << lv[pocitadlo].suma;


    }
    delete [] lv;

    return 0;
}

[JockX]

lv[pocitadlo].name = pt[n].name; You cannot do that. You have some options:

1. Use memcpy (http://www.cplusplus.com/reference/cstring/memcpy/)

2. Copy each char in name[] array individualy:

for(i=0; i<sizeof(lv[pocitadlo].name) i++)
  lv[pocitadlo].name[i] = pt[n].name[i];

3. Easiest: Declare name as std::string

#include <string>
struct prehled
{
    std::string name;
    int suma;
};

As a sidenote, why pocitadlo is always set to zero? Shouldn't it be replaced with n in first loop and with a in the second?

[S G H]

Why memcpy and not strcpy?

[acerr]

thank you!
And Why I can not transmit array from struct to struct?

[ajh32]

And Why I can not transmit array from struct to struct?

You can with a custom constructor:

struct prehled
{
	// default constructor:
	prehled()
	{
		memset(name, '\0', 200);
		suma = 0;
	}

	// custom constructor:
	prehled(const char* _name, int _suma = 0)
	{
		if (strlen(_name) < 200)
			strcpy(name, _name);
		else
			memset(name, '\0', 200);
		suma = _suma;
	}

	// copy constructor:
	prehled(const prehled& source)
	{
		strcpy(name, source.name);
		suma = source.suma;
	}

	char name[200];
	int suma;
};

int main()
{
	prehled* a = new prehled("MyName");
	prehled* b = new prehled(*a);

	delete a;
	delete b;

	return 0;
} 

[S G H]

if (strlen(_name) < 200)
	strcpy(name, _name);
else
	memset(name, '\0', 200); // Needed in all occurrences?
suma = _suma;

Waste of performance.
Use this:

struct prehled
{
        prehled(const char * Name, int Suma) {
            strcpy(name,Name);
            suma = Suma;
        }
        prehled() : suma(0) {
            name[0] = 0;
        }
        prehled(const prehled& o) { (*this) = o; }
        prehled& operator= (const prehled& o) {
            strcpy(name, o.name);
            suma = o.suma;
        }
	char name[200];
	int suma;
};

Then you can substitute

lv[pocitadlo].suma = pt[n].suma;
lv[pocitadlo].name = pt[n].name;

with:

lv[pocitadlo] = pt[n];