12febbraio V2

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

#define DATA_F "dati.txt"
#define FILE_ORD "ordered.txt"

#define STRLEN 256

typedef unsigned int uint;

// funzioni di bellezza
unsigned int my_strlen(char *str)     //returns string lenght
 {  unsigned int i = 0;   while(str[i] != '\0') i++;   return i;  }
//::::

int main(void)
 {
  uint nf, nv;     float threshold, mean;    uint* pv;     uint i,j;
  FILE* pf;  FILE** ppfiles;    char str[STRLEN], *label;

  if((pf=fopen(DATA_F,"r"))==NULL) goto f_err;       fscanf(pf,"%s\n",str);

  if((label=(char*)malloc(sizeof(char)*my_strlen(str)))==NULL) goto m_err;
  sprintf(label,"%s",str);  //name of files is placed in a string of fitting lenght...

  fscanf(pf,"%s\n",str);    nf=atoi(str);
  fscanf(pf,"%s\n",str);    nv=atoi(str);
  fscanf(pf,"%s",str);      threshold=atof(str);    fclose(pf);
  printf("Reading from '%s' nf=%u, nv=%u, threshold=%f\n",DATA_F,nf,nv,threshold);

  if( (pv=(uint*)malloc(sizeof(uint)*nf))==NULL) goto m_err;
  if( (pf=fopen(FILE_ORD,"w")) == NULL) { free(pv);  goto f_err; }
  if( (ppfiles = (FILE**)malloc(sizeof(FILE*)*nf)) == NULL) { fclose(pf); free(pv); goto m_err; }
  for(i=0; i<nf; i++)   //opening files containing data
   {
     sprintf(str,"%s%u.txt",label,i);
     if((ppfiles[i]=fopen(str,"r"))==NULL)
      { for(i--;i>=0;i--) fclose(ppfiles[i]);   fclose(pf); free(pv);  goto f_err;  }
   }

  for(i=0; i<nv; i++) //navigating through number of ROWs
   {
    for(mean=j=0; j<nf; j++) { fscanf(ppfiles[j],"%s\n",str);  mean+=pv[j]=atoi(str); }
    printf("mean[%u]=%f -> ",i, mean/=nf);
    if(mean>threshold) { printf("REJECTED\n"); continue; }
    printf("ACCEPTED\n");   // & printing in txt file...
    for(j=nf;j>0;) fprintf(pf,"%u\t",pv[--j]);     fprintf(pf,"\n");
   }

  for(i=0; i<nf; i++) fclose(ppfiles[i]);      fclose(pf);     free(pv);

  printf("\nEOP\n");   return EXIT_SUCCESS;
  m_err: printf("Memory error"); return EXIT_FAILURE;
  f_err: printf("File error");   return EXIT_FAILURE;
 }