add unsigned int array in {} later

Question

Can I do somethings like this in c++ or what should I do.

unsigned int code[180];

    if ( somethings ) 
    {
      code[] = {3150,1550,400,400,400,1150,450,350,400,400,400,1200,400,400,400,1150,400,400,400,400,400,1150,400,1200,400,1200,400,350,400,1200,400,400,400,1150,400,1200,400,1200,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,400,400,400,400,1150,450,350,400,400,400,1200,400,1150,400,400,400,1200,400,1150,400,1200,400,1150,450,1150,400,1200,400,350,450,1150,400,400,400,1150,450,350,400,400,400,400,400,400,400,1150,400,400,400,1200,400,400,400,1150,400,1200,400,1150,400,1200,400,1200,400,350,400,400,400,1200,400,400,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,1200,400,1150,450,1150,400,400,350,1200,450,350,400,1200,400,400,400,350,450,350,400,400,400,1200,400,350,450,1150,400,1000};
      //irsend.sendRaw(code,sizeof(code)/sizeof(int),khz);
    }

You can use a std::array or a std::vector for the array, solves the assignment problem. You can use std::string for the string, solves the comparison problem. — Cheers and hth. - Alf
– Cheers and hth. - Alf, Commented Jul 12, 2014 at 18:20
I guess you need to test it by yourself (create a new file and compile it), or dig through the C++ standard stackoverflow.com/questions/18308941/… — Ming-Tang
– Ming-Tang, Commented Jul 12, 2014 at 18:20
If you must use C-style code, create global/static array and assign its address to pointer. If you want a copy, use std::memcpy. But, prefer C++ containers mentioned in a comment above. — hyde
– hyde, Commented Jul 12, 2014 at 18:41

K.K · Accepted Answer · 2014-07-12 18:45:47Z

I don't think you can initialize the array using {...} after it's declaration. So, use a temporary array to store your contents and memcpy the contents into it (if that is your use case).

unsigned int code[180];
  if ( _SOME_CONDITION_ ) 
  {      

    unsigned int temp1 [] ={3150,1550,400,400,400,1150,450,350,400,400,400,1200,400,400,400,1150,400,400,400,400,400,1150,400,1200,400,1200,400,350,400,1200,400,400,400,1150,400,1200,400,1200,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,400,400,400,400,1150,450,350,400,400,400,1200,400,1150,400,400,400,1200,400,1150,400,1200,400,1150,450,1150,400,1200,400,350,450,1150,400,400,400,1150,450,350,400,400,400,400,400,400,400,1150,400,400,400,1200,400,400,400,1150,400,1200,400,1150,400,1200,400,1200,400,350,400,400,400,1200,400,400,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,1200,400,1150,450,1150,400,400,350,1200,450,350,400,1200,400,400,400,350,450,350,400,400,400,1200,400,350,45 0,1150,400,1000};
    //irsend.sendRaw(code,sizeof(code)/sizeof(int),khz);

    memcpy(code, temp1, sizeof(temp1) / sizeof(*temp1));
  } else {
    unsigned int temp2 = {...};
    memcpy(code, temp2, sizeof(temp2) / sizeof(temp2));
  }

sp2danny · Accepted Answer · 2014-07-13 00:09:10Z

1

since you tagged this c++, I would suggest:

vector<int> code;

if( condition_1 )
    code = { 3,7,8 };
else if( condition_2 )
    code = { 9,11,34 };

etc.

it requires c++11 to compile

answered Jul 13, 2014 at 0:09

sp2danny

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Comments

Michael Gazonda · Accepted Answer · 2014-07-12 18:22:01Z

0

Set the code ahead of time:

unsigned int code[] = {3150,1550,400,400,400,1150,450,350,400,400,400,1200,400,400,400,1150,400,400,400,400,400,1150,400,1200,400,1200,400,350,400,1200,400,400,400,1150,400,1200,400,1200,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,400,400,400,400,1150,450,350,400,400,400,1200,400,1150,400,400,400,1200,400,1150,400,1200,400,1150,450,1150,400,1200,400,350,450,1150,400,400,400,1150,450,350,400,400,400,400,400,400,400,1150,400,400,400,1200,400,400,400,1150,400,1200,400,1150,400,1200,400,1200,400,350,400,400,400,1200,400,400,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,1200,400,1150,450,1150,400,400,350,1200,450,350,400,1200,400,400,400,350,450,350,400,400,400,1200,400,350,450,1150,400,1000};

if (strcmp((char*)data,"off") == 0) 
{
    // do stuff with the code here
    //irsend.sendRaw(code,sizeof(code)/sizeof(int),khz);
}

answered Jul 12, 2014 at 18:22

Michael Gazonda

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2 Comments

Jongz Puangput Over a year ago

can i set value of code[] inside if because it will be many value base on condition

Michael Gazonda Over a year ago

Are the codes pre-determined, or are you calculating them?

Jan Smrčina · Accepted Answer · 2014-07-12 19:59:36Z

This

code[] = {3150,1550,400,400,400,1150,450,350,400,400,400,1200,400,400,400,1150,400,400,400,400,400,1150,400,1200,400,1200,400,350,400,1200,400,400,400,1150,400,1200,400,1200,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,400,400,400,400,1150,450,350,400,400,400,1200,400,1150,400,400,400,1200,400,1150,400,1200,400,1150,450,1150,400,1200,400,350,450,1150,400,400,400,1150,450,350,400,400,400,400,400,400,400,1150,400,400,400,1200,400,400,400,1150,400,1200,400,1150,400,1200,400,1200,400,350,400,400,400,1200,400,400,400,350,400,400,400,400,400,400,400,1150,400,1200,400,400,400,400,400,1150,400,1200,400,1150,450,1150,400,400,350,1200,450,350,400,1200,400,400,400,350,450,350,400,400,400,1200,400,350,450,1150,400,1000};

would be an initialization and you can not do such thing in C++ after declaration. Proper way would be something like:

const int code_if[] = { /* your numbers here */ };
int code[];
if ( /* something */ ) {
    code = code_if;
}

If you really need to move in the array, then you should use memcpy() as others already suggested.

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