Problem with voltimeter

hi all.
i programming voltimeter using arduino uno , double eight-segment display. here code

code: [select]

float voltaje;
  float voltajemap;
  int entera;
  int decimal;
  boolean pina[]={1,0,1,1,0,1,1,1,1,1};
  boolean pinb[]={1,1,1,1,1,0,0,1,1,1};
  boolean pinc[]={1,1,0,1,1,1,1,1,1,1};
  boolean pind[]={1,0,1,1,0,1,1,0,1,0};
  boolean pine[]={1,0,1,0,0,0,1,0,1,0};
  boolean pinf[]={1,0,0,0,1,1,1,0,1,1};
  boolean ping[]={0,0,1,1,1,1,1,0,1,1};


  void setup(){
   
  pinmode(a0,input);
  for(int p=6;p<14;p++){
  pinmode(p,output);} 
  pinmode(1,output);
  pinmode(2,output);
  digitalwrite(13,high); //el punto de separacion de decimales, siempre prendido

  }


  void loop(){

  voltaje=analogread(a0);
 
  // voltajemap=map(voltaje,0,1023,0,5); la funcion map no sirve para retornar numeros fraccionarios
  voltajemap=(voltaje*5)/1023;
 
  sacarentera(voltajemap);
  sacardecimal(voltajemap);
 
  intermitar();

  }

  void sacarentera(float a){
  entera=(int)a;
  }

  void sacardecimal(float b){

  decimal= (int)((b-entera)*10);
  }

  void escribirdigito(int c){

  digitalwrite(6,pina[c]);
  digitalwrite(7,pinb[c]);
  digitalwrite(8,pinc[c]);
  digitalwrite(9,pind[c]);
  digitalwrite(10,pine[c]);
  digitalwrite(11,pinf[c]);
  digitalwrite(12,ping[c]);

  }

  //esta funcion prende y apaga los pines 1 y 2 de forma alternada cada 10 ms.

  void intermitar(){
  digitalwrite(1,high);
  digitalwrite(2,low);
  escribirdigito(decimal);
  delay(1000);
  digitalwrite(1,low);
  digitalwrite(2,high);
  escribirdigito(entera);
  delay(1000);
  }

this circuit:



ok, problem ut doesn't work. displays "0" in right hand side segment, , nothing in left one. right 1 turns on , off every 1 second, fine. delay later 10 ms, intermitence not noticed. first want work.
 to test code tried sending values 1 , 2 in function "escribirdigito", , worked. so, guess problem data processing part of code, mean functions "sacarentera" , "sacardecimal".

basically trying convert analogread(a0) goeas 1023 0, number between 5.0 , 0.0.,
then functions "sacarentera" , "sacardecimal" extract integer , decimal parts of number , store them.-

quote

my problem ut doesn't work.

what instead?

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