2.8 tft screen increment numbers

Hi

i brought a 2.8 tft screen with cap touch from adafruit however i have run into a bit of an issue with my code

#include <Adafruit_GFX.h>
#include <SPI.h>
#include <Wire.h>
#include "Adafruit_ILI9341.h"
#include <TouchScreen.h>
#include <SD.h>
#include <Adafruit_FT6206.h>
#include <Adafruit_ILI9341.h>


Adafruit_FT6206 ctp = Adafruit_FT6206();

#define TS_MINX 150
#define TS_MINY 130
#define TS_MAXX 3800
#define TS_MAXY 4000

#define MINPRESSURE 150
#define MAXPRESSURE 4000

#define TFT_CS 10
#define TFT_DC 9
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

boolean RecordOn = false;

#define FRAME_X 210
#define FRAME_Y 180
#define FRAME_W 100
#define FRAME_H 50

#define REDBUTTON_X FRAME_X
#define REDBUTTON_Y FRAME_Y
#define REDBUTTON_W (FRAME_W/2) `
#define REDBUTTON_H FRAME_H

#define GREENBUTTON_X (REDBUTTON_X + REDBUTTON_W)
#define GREENBUTTON_Y FRAME_Y
#define GREENBUTTON_W (FRAME_W/2)
#define GREENBUTTON_H FRAME_H

#define WHITE 0xFFFF
#define BLACK 0x0000
#define RED 0xF800


#define SD_CS 4

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


///////////////////////////////////////////////////////////////////////////////////////////////////////////////////



void setup(void)
{
  Serial.begin(9600);
  tft.begin();
//ctp.begin(40);
  yield();

  Serial.print("Initializing SD card...");
  if (!SD.begin(SD_CS)) {
    Serial.println("failed!");
  }
  Serial.println("OK!");

   if (! ctp.begin(40)) {  // pass in 'sensitivity' coefficient
    Serial.println("Couldn't start FT6206 touchscreen controller");
    while (1);
  }

  Serial.println("Capacitive touchscreen started");

//bmpDraw("purple.bmp", 0, 0);

//delay(2000);

tft.fillScreen(WHITE);
tft.setRotation(1);


tft.fillRoundRect(35, 175, 80, 38, 20,BLACK);
tft.setCursor(67, 184);
  tft.setTextColor(WHITE);  tft.setTextSize(3);
  tft.println("+");

tft.fillRoundRect(215, 175, 80, 38, 20,BLACK);
tft.setCursor(248, 184);
  tft.setTextColor(WHITE);  tft.setTextSize(3);
  tft.println("-");



  tft.fillRoundRect(35, 118, 80, 38, 20,BLACK);
tft.setCursor(67, 126);
  tft.setTextColor(WHITE);  tft.setTextSize(3);
  tft.println("+");

  tft.fillRoundRect(215, 118, 80, 38, 20,BLACK);
tft.setCursor(248, 126);
  tft.setTextColor(WHITE);  tft.setTextSize(3);
  tft.println("-");


tft.fillCircle(164, 60, 50, BLACK);
tft.fillCircle(164, 60, 40, WHITE);
tft.fillCircle(164, 60, 30, BLACK);
tft.fillCircle(164, 60, 20, WHITE);



tft.fillRoundRect(156, 35, 17, 40, 10,BLACK);
  
  
}


void loop()
{





if (! ctp.touched()) {
    return;
  }

 
  TS_Point p = ctp.getPoint();
  


  // flip it around to match the screen.
  p.x = map(p.x, 0, 240, 240, 0);
  p.y = map(p.y, 0, 320, 320, 0);



 Serial.print("("); Serial.print(p.x);
 Serial.print(", "); Serial.print(p.y);
 Serial.println(")");
 
  for (i = 4; i < 11; i++) {

    if (p.y > 70 && p.y < 90 && p.x > 40 && p.x < 60) {
      
    i++;
  
}
 tft.setCursor(159, 187);
  tft.setTextColor(BLACK);  
  tft.setTextSize(3);
  tft.println(i);

}

  
}



#define BUFFPIXEL 20

void bmpDraw(char *filename, uint8_t x, uint16_t y) {

  File     bmpFile;
  int      bmpWidth, bmpHeight;   // W+H in pixels
  uint8_t  bmpDepth;              // Bit depth (currently must be 24)
  uint32_t bmpImageoffset;        // Start of image data in file
  uint32_t rowSize;               // Not always = bmpWidth; may have padding
  uint8_t  sdbuffer[3*BUFFPIXEL]; // pixel buffer (R+G+B per pixel)
  uint8_t  buffidx = sizeof(sdbuffer); // Current position in sdbuffer
  boolean  goodBmp = false;       // Set to true on valid header parse
  boolean  flip    = true;        // BMP is stored bottom-to-top
  int      w, h, row, col;
  uint8_t  r, g, b;
  uint32_t pos = 0, startTime = millis();

  if((x >= tft.width()) || (y >= tft.height())) return;

  Serial.println();
  Serial.print(F("Loading image '"));
  Serial.print(filename);
  Serial.println('\'');

  // Open requested file on SD card
  if ((bmpFile = SD.open(filename)) == NULL) {
    Serial.print(F("File not found"));
    return;
  }

  // Parse BMP header
  if(read16(bmpFile) == 0x4D42) { // BMP signature
    Serial.print(F("File size: ")); Serial.println(read32(bmpFile));
    (void)read32(bmpFile); // Read & ignore creator bytes
    bmpImageoffset = read32(bmpFile); // Start of image data
    Serial.print(F("Image Offset: ")); Serial.println(bmpImageoffset, DEC);
    // Read DIB header
    Serial.print(F("Header size: ")); Serial.println(read32(bmpFile));
    bmpWidth  = read32(bmpFile);
    bmpHeight = read32(bmpFile);
    if(read16(bmpFile) == 1) { // # planes -- must be '1'
      bmpDepth = read16(bmpFile); // bits per pixel
      Serial.print(F("Bit Depth: ")); Serial.println(bmpDepth);
      if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed

        goodBmp = true; // Supported BMP format -- proceed!
        Serial.print(F("Image size: "));
        Serial.print(bmpWidth);
        Serial.print('x');
        Serial.println(bmpHeight);

        // BMP rows are padded (if needed) to 4-byte boundary
        rowSize = (bmpWidth * 3 + 3) & ~3;

        // If bmpHeight is negative, image is in top-down order.
        // This is not canon but has been observed in the wild.
        if(bmpHeight < 0) {
          bmpHeight = -bmpHeight;
          flip      = false;
        }

        // Crop area to be loaded
        w = bmpWidth;
        h = bmpHeight;
        if((x+w-1) >= tft.width())  w = tft.width()  - x;
        if((y+h-1) >= tft.height()) h = tft.height() - y;

        // Set TFT address window to clipped image bounds
        tft.setAddrWindow(x, y, x+w-1, y+h-1);

        for (row=0; row<h; row++) { // For each scanline...

          // Seek to start of scan line.  It might seem labor-
          // intensive to be doing this on every line, but this
          // method covers a lot of gritty details like cropping
          // and scanline padding.  Also, the seek only takes
          // place if the file position actually needs to change
          // (avoids a lot of cluster math in SD library).
          if(flip) // Bitmap is stored bottom-to-top order (normal BMP)
            pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
          else     // Bitmap is stored top-to-bottom
            pos = bmpImageoffset + row * rowSize;
          if(bmpFile.position() != pos) { // Need seek?
            bmpFile.seek(pos);
            buffidx = sizeof(sdbuffer); // Force buffer reload
          }

          for (col=0; col<w; col++) { // For each pixel...
            // Time to read more pixel data?
            if (buffidx >= sizeof(sdbuffer)) { // Indeed
              bmpFile.read(sdbuffer, sizeof(sdbuffer));
              buffidx = 0; // Set index to beginning
            }

            // Convert pixel from BMP to TFT format, push to display
            b = sdbuffer[buffidx++];
            g = sdbuffer[buffidx++];
            r = sdbuffer[buffidx++];
            tft.pushColor(tft.color565(r,g,b));
          } // end pixel
        } // end scanline
        Serial.print(F("Loaded in "));
        Serial.print(millis() - startTime);
        Serial.println(" ms");
      } // end goodBmp
    }
  }

  bmpFile.close();
  if(!goodBmp) Serial.println(F("BMP format not recognized."));
}
uint16_t read16(File &f) {
  uint16_t result;
  ((uint8_t *)&result)[0] = f.read(); // LSB
  ((uint8_t *)&result)[1] = f.read(); // MSB
  return result;
}

uint32_t read32(File &f) {
  uint32_t result;
  ((uint8_t *)&result)[0] = f.read(); // LSB
  ((uint8_t *)&result)[1] = f.read();
  ((uint8_t *)&result)[2] = f.read();
  ((uint8_t *)&result)[3] = f.read(); // MSB
  return result;
}

i want to display a number on my screen, however i want to add to the number by one. everytime i touch a button on my screen however i have tried a lot and havent gotten close to a answer if anyone could help that would be great

thank you