#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <math.h>

#define STRLEN       256
#define FILEPARI     "pari.bin"
#define FILEDISPARI  "dispari.bin"
#define BASENAME     "file"

typedef FILE*   pfile;
typedef float*  pfloat;

int main(void)
  {
    char     s[STRLEN];
    pfile    pfpari,pfdispari;
    unsigned np,nd,i;
    float    minimo=FLT_MAX,massimo=-FLT_MAX;
    pfloat   pdati;
    int      vl,vr,j,contatore=0;

    if((pfpari=fopen(FILEPARI,"rb"))==NULL) {printf("Errore file 1\n");return EXIT_FAILURE;}
    if((pfdispari=fopen(FILEDISPARI,"rb"))==NULL) {printf("Errore file 2\n");return EXIT_FAILURE;}
    fread(&np,sizeof(unsigned),1,pfpari);
    fread(&nd,sizeof(unsigned),1,pfdispari);
    if((pdati=(pfloat)malloc(sizeof(float)*(np+nd)))==NULL) {printf("Errore memoria");return EXIT_FAILURE;}
    for(i=0;i<(np+nd);i++)
      {
        if((i%2)!=0)
          fread(&pdati[i],sizeof(float),1,pfdispari);
        else
          fread(&pdati[i],sizeof(float),1,pfpari);
      }
    fclose(pfpari);
    fclose(pfdispari);

    for(i=0;i<(nd+np);i++)
      {
        if(pdati[i]>massimo)
          massimo=pdati[i];
        if(pdati[i]<minimo)
          minimo=pdati[i];
        printf("%.2f\n",pdati[i]);
      }
    printf("Minimo=%.2f Massimo=%.2f\n",minimo,massimo);
    vl=floor(minimo);
    vr=ceil(massimo);


    for(j=vl;j<vr;j++)
      {
        for(i=contatore=0;i<(np+nd);i++)
          {
            if((pdati[i]>=(j))&&(pdati[i]<(j+1)))
              contatore++;
          }
        printf("Nell’intervallo [%d,%d[ abbiamo %d misure\n",j,j+1,contatore);
        if(contatore!=0)
          {
            sprintf(s,"%s%d.txt",BASENAME,j);
            if((pfpari=fopen(s,"w"))==NULL) {printf("Errore file 3\n");return EXIT_FAILURE;}
            fprintf(pfpari,"%d",contatore);
            fclose(pfpari);
          }
      }

  }