Data Types in Array

[Anton Wibowo]

double test[3][2] = { {1.11, "test1"}, {2.22, "test2"}, {3.33,"test3"} };

// Result - compiler warnings "implicit conversion from 'string' to 'number'"
// 1.11, 0
// 2.22, 0
// 3.33, 0


double test[3][2] = { {1.11, (char)"test1"}, {2.22, (char)"test2"}, {3.33,(char)"test3"} };

// Result - no compiler warnings
// 1.11, 0
// 2.22, 0
// 3.33, 0

How to make result like this:

1.11, test1

2.22, test2

3.33, test3

Thanks for the help.

[Papillon]

Use a struct.

struct data
  {
    double d;
    string s;
  };

data test[3] = { {1.11, "test1"}, {2.22, "test2"}, {3.33,"test3"} };

[Anton Wibowo]

Papillon:

Use a struct.

struct data
  {
    double d;
    string s;
  };

data test[3] = { {1.11, "test1"}, {2.22, "test2"}, {3.33,"test3"} };


  for(int i=0;i<3;i++)
  {
  Print("TestValue: ", test[i] );
  }

//Result: Compiler Error - 'test' - objects are passed by reference only        

Thanks for the answer.

But how to call the values?

Sorry, I am newbie on MQL4

[honest_knave]

wieb:

Thanks for the answer.

But how to call the values?

Sorry, I am newbie on MQL4

struct data
  {
    double d;
    string s;
  };

data test[3] = { {1.11, "test1"}, {2.22, "test2"}, {3.33,"test3"} };


  for(int i=0;i<3;i++)
  {
  printf("TestValue: %f %s", test[i].d, test[i].s );
  }

https://www.mql5.com/en/docs/basis/types/classes

[Anton Wibowo]

honest_knave:

https://www.mql5.com/en/docs/basis/types/classes

Thanks a lot for all the help

[Anton Wibowo]

struct data
{
    double d;
    string s;
};
    
  
void test(data& testx[])
{
   ArrayResize(testx,3,3);
   
  for(int i=0;i<3;i++)
  {
      testx[i].d = 1.11+i;
      testx[i].s = "TEST" + (string)i;
  }    
}


void OnStart()
{
   double test[3];
      
   for(int i=0;i<3;i++)
   {
      printf("TestValue: %f %s", test[i].d, test[i].s );
   }
}

//Results - Error - 'd' - struct or class type expected - 's' - struct or class type expected

How to solve this?

Thanks.

[Anton Wibowo]

wieb:

How to solve this?

Thanks.

struct data
{
    double d;
    string s;
};
 
   
void test(data& testx[])
{
   ArrayResize(testx,3,3);
   
  for(int i=0;i<3;i++)
  {
      testx[i].d = 1.11+i;
      testx[i].s = "TEST" + (string)i;
  }    
}


void OnStart()
{  
  data test[3];   

  for(int i=0;i<3;i++)
  {
      printf("TestValue: %f %s", test[i].d, test[i].s );
  }

}

//Finally - no compiler errors - but wrong results
//Results:
//TestValue: 0.000000 (null) 
//TestValue: 0.000000 (null) 
//TestValue: 0.000000 (null) 

How to fill array in test function (not OnStart function) and the result to be like this:

TestValue: 1.110000 test1

TestValue: 2.220000 test2

TestValue: 3.330000 test3

Thanks.

[honest_knave]

wieb:

How to fill array in test function (not OnStart function) and the result to be like this:

TestValue: 1.110000 test1

TestValue: 2.220000 test2

TestValue: 3.330000 test3

Thanks.

You never call your function.

struct data
{
    double d;
    string s;
};
 
   
void test(data& testx[])
{
   ArrayResize(testx,3,3);
   
  for(int i=0;i<3;i++)
  {
      testx[i].d = 1.11+i;
      testx[i].s = "TEST" + (string)i;
  }    
}


void OnStart()
{  
  data test[3];   
  test(test);

  for(int i=0;i<3;i++)
  {
      printf("TestValue: %f %s", test[i].d, test[i].s );
  }

}

[Anton Wibowo]

honest_knave:

You never call your function.

Thank you very much for all the help, now it works as expected.