Thread: Problem with values changing

At first i would like to apologize for my bad English.

Second, i have a problem with my C++ program.
I have class

Code:

class Trena   {
      public:
      string dromologia[6];
      int thesis[3];
      int kr_dr;
      int kr_thesis;
      int change;
    
      void initialize_t();

in a hyper class Metaforika

I set values to this with this code :

Code:

void Metaforika::Trena::initialize_t(){
     dromologia[1] = "patra athina";
     dromologia[2] = "patra pyrgos ";
     dromologia[3] = " patra thesalloniki";
     dromologia[4] = " patra lianokladi";
     dromologia[5] = "athina larisa";  
     thesis[1] = 6;
     thesis[2] = 12;
     thesis[3] = 0;

BUT when i try to change the values kr_dr, kr_thesis through a function, the cannot be changed.

Code:

void Metaforika::kratisi(int x,int y,int z){

Trena train;
train.kr_dr =x;
train.kr_thesis=y;

it gives me values of "424577" ( not exactly like this )

i've trying using a constructor

Code:

Metaforika::Trena::Trena(int y,int z) {
                             
                             kr_dr =y;
                             kr_thesis=z;
                             thesis[z]--;

but same thing happens.

Any help would be appreciated

As you told me, i initialize kr_dr and kr_thesis.

Code:

void Metaforika::Trena::initialize_t(){
     dromologia[1] = "patra athina";
     dromologia[2] = "patra pyrgos ";
     dromologia[3] = " patra thesalloniki";
     dromologia[4] = " patra lianokladi";
     dromologia[5] = "athina larisa";  
     thesis[1] = 6;
     thesis[2] = 12;
     thesis[3] = 0;
     kr_dr=0;
     kr_thesis=0;

I have another class called Ploio.

THIS code give me the fault numbers.

Code:

void Metaforika::test() {
            
             Trena train;
             Ploa boat;       

train.initialize_t();
boat.initialize_p();
kratisi(1,2,2);

BUT if i call it from main

Code:

int main() {
    int i;
   Metaforika Meta;
   Meta.test();
   Meta.kratisi(1,2,2);

   cin>> i;
    
     
    return(0);

the numbers fix. Thats the real problem i have i think.
The kratisi's function variables cannot be changed through another function but they can be changed through main . Is there something i'm missing?
eg. The array index problem doesn't matter because the value is always >0 [ i've created tha same program with structures and didn't have problem]

Your string array (if you want to store strings in your array), should be declared something like:

string dromologia[6][40];

Then you can assign a string to dromologia[0] and so on.

've fixed that but still, my problem is with numbers kr_dr and kr_thesis that dont really change. only in main the can be changed.
am i missing something?

Code:

 cout << train.kr_dr<< endl;

i'm outputting the results, i thought it wasn't necessary to post it.

i declare an object of class Trena named train. Doesn't that suppose to change the values of the variables declared in the structure of the class.

example.

Code:

Class Metaforika { 
Class Trena {
int c;
void test();
}}
 
void Metaforika::test() {
Trena train;
train.c =5;
}

isn't that suppose to print 5 in train.c ? the int c; declared in the class.
I'm just talking theoretical so if i'm saying something wrong you can tell me.

OK. I think you've got that right.
What do i do to fix that?
Thank you guys.

Instance of trena in Metaforika Class

Code:

public:   
          void kratisi(int x,int y,int z );  
          Trena train;

Constructor to set kr_dr , and kr_thesis
given values of y = 2 , z = 2

Code:

 Metaforika::Trena::Trena(int y,int z) {
                             
                             kr_dr =y;
                            kr_thesis=z;
                             thesis[z]--;
                             cout << y << " " << z;

Printing the values in the other function, the function that has problem

Code:

void Metaforika::kratisi(int x,int y,int z){
if (x==1) {
Trena(y,z);
cout << train.kr_dr<< endl; }}

OUTPUT

Code:

2 2

20898778896

still..

It gets me this error:

no match for call to `(Metaforika::Trena) (int&, int&)'

i'm starting to be a pain in the ............sorry matsp.

what changes shall i do to this code?

Code:

Metaforika::Trena::Trena(int y,int z) {

in my Metaforika constructor? How is that possible? My Metaforika constractor is just empty. I'm missing serious subjects here i think.

or the other way,
set function for my train component?