c++ - Declaring multiple instances of a TFT screen class? -

undoubtedly due lack of encyclopedic knowledge of c/c++, have found myself in quagmire while trying initialize multiple instances of tft screen class. tft screen adafruit_ssd1331, , have 1 small sketch control more 1 of these identical code.

these errors i'm getting:

slapbmp.ino:61:5: error: 'tft' in 'class adafruit_ssd1331' not name type slapbmp.ino:62:5: error: 'tft' in 'class adafruit_ssd1331' not name type slapbmp.ino:63:3: error: missing type-name in typedef-declaration 

...when try to compile code:

#include <adafruit_gfx.h> #include <adafruit_ssd1331.h> #include <sd.h> #include <spi.h>   // if using hardware spi interface, these pins (for future ref) #define sclk 13 #define mosi 11 #define rst  9  #define cs   10 #define dc   8  #define cs2  5 #define dc2  4   // color definitions #define black           0x0000 #define blue            0x001f #define red             0xf800 #define green           0x07e0 #define cyan            0x07ff #define magenta         0xf81f #define yellow          0xffe0   #define white           0xffff  // draw images sd card, share hardware spi interface  namespace std {   typedef struct adafruit_ssd1331   {   } tft; }    namespace initscreens {   typedef struct {     adafruit_ssd1331::tft scr1 = adafruit_ssd1331(cs, dc, rst);     adafruit_ssd1331::tft scr2 = adafruit_ssd1331(cs2, dc2, rst);   }; };  // arduino uno/duemilanove, etc //  connect sd card mosi going pin 11, miso going pin 12 , sck going pin 13 (standard) //  pin 4 goes cs (or whatever have set up) #define sd_cs 3    // set chip select line whatever use (4 doesnt conflict library) #define sd_cs2 2  // file file bmpfile;  // information extract bitmap file int bmpwidth, bmpheight; uint8_t bmpdepth, bmpimageoffset;  void setup(void) {  //... 

just note, i'm trying use struct in way allows me not have modify any*.h files.

this looks issue namespacing. compiler error tells compiler wasn't able find name, reason couldn't because name tft within std namespace here. need fix or change how code designed.

given c++ change things few things make use of c++ language features:

//get rid of of #defines const int cs = 10; const int dc = 8;  //make struct contain info screens  struct screens {     adafruit_ssd1331 scr1;     adafruit_ssd1331 scr2;      screens():        scr1(cs, dc, rst),        scr2(cs2, dc2, rst)     { } }; 

then can instantiate class once in setup if using arduino convention. (or place somewhere appropriate before enter main loop)