arduino_char_string_examples.cpp

//How to to append a char array in arduino

char* p = (char*)malloc(sizeof(char)*12);
strcpy(p,"hello world");
cout << p << "\r\n";
p = (char*)realloc(p, sizeof(char)*24);
strcat(p," from Nish");
cout << p << "\r\n";
free(p);


// How to return a char* aka string from method
 

int method(char* p) {                 
  if (p) {
    strcpy(p, "I like c++");
  }
  return strlen("I like c++");
}

int main()
{
      char* par = NULL;
      int len = method(par);

      if (len > 0) {
          par = (char*)malloc(len+1);
          memset(par, 0, len + 1);
          method(par);
          cout << "ret at: " << par;
      }
      
      free(par);
}