Put value to the char array using a function

Projects Programming
1

I m getting mad with this. How to fix it working right using char arrays? I want a function put _address = address char array.

class Sensor{

public:
int id;
char address[30];

Sensor(int _id, char (*_address)[30]){
      id = _id;
      address = _address;
}
}

And how to use return method?

char* getAddress() {
return address;
2 
class sensor_t
{
public:
    int     _id;
    char*   _address;

    sensor_t(int const id, char* const address)
        : _id(id)
        , _address(address)
    {   }
    
    char* getAddress() const { return _address;}
};
3

Thanks. But how can I determine address size? Or what is the best way?

4

tolerance_zero:
But how can I determine address size?

I think you're going to have to pass it in, probably using the sizeof() operator.

5

But how can I determine address size?

Addresses are always two bytes (on the Arduino).

If address is a string (a NULL terminated array of chars), strlen() will tell you the useful amount of data in the array. If address is not a string, then the called function can NOT determine the size of the array. It must be told the size.

6

Step back and tell us what you're trying to do, why and how you plan to use it.

7

Thanks lloyddean. Your code works than I thought. I just wanted to change strings to char arrays.

8

When you say "strings" what are you referring to; give me an example, or two, of these "strings" you wish to "change" into char arrays.