Thread: Filestat

Haveing problem with this code, the program computes basic statistic on a single file.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <math.h>

typedef struct_StatDat {

 int size;
 double avg, var, skew, kurt, avg_dev, prev, self;
 int diff_vals;
}

int FileStats(char *fn, StatDat *stats );

void main(int argc, char* argv[]) {
  int test;
  char fn[128];
  StatDat stats;

  strcopy(fn, argv[1]);
  test = FileStats(fn, &stats);
  if(test == 0){
    printf(" %.3f %.3f %.3f %.3f %.3f %.4f %.4f %d\n", stats.avg, stats.var, stats.skew, 
       stats.kurt, stats.avg_dev, stats.prev, stats.self, stats.diff_vals);
  }
  else {
    printf("State returned error code %d\n", test);
  }
}

int FileStats(char *fn, StatDat *stats){
  int i, got, vals[256];
  int ParCnt, parity[2], SelfCnt;
  FILE *Fin;
  double d_temp, d_temp2, correct;
  unsigned char buffer[1024];

  Fin = fopen(fn, "rb");
  if(!Fin){
    printf("Unable to open file %s\n", fn);
    return(1);
  }

  d_temp = 0.0;
  stats->avg_dev = 0.0;
  stats->var = 0.0;
  stats->skew = 0.0;
  stats->kurt = 0.0;
  stats->diff_vals = 0.0;
  memset(vals, 0, 256*sizeof(int));
  memset(parity, 0, 2*sizeofint(int));
  ParCnt = SelfCnt = 0;

  got = fread(buffer, 1, 1024, Fin);
  while(got){
    for(i=0; i<got; i++){
      d_temp += (double) buffer[i];
      vals[buffer[i]] ++;
      parity[0] = buffer[i] % 2;
      if(parity[0] == parity[1]) { ParCnt++; }
      if(parity[0] == (buffer[i]/128)) { SelfCnt++; }
      parity[1] = parity[0];
    }
    got = fread(buffer, 1, 1024, Fin);
  }

  stats->size = ftell(Fin);
  stats->avg = d_temp*1.0/stats->size;
  stats->prev = ParCnt*1.0/stats->size;
  stats->self = SelfCnt*1.0/stats->size;

  fseek(Fin, 0, 0);
  got = fread(buffer, 1, 1024, Fin);
  correct = 0.0;
  while(got){
    for(i=0; i<got; i++){
      d_temp = buffer[i] - stats->avg;
      stats->avg_dev += fabs(d_temp);
      correct += d_temp;
      d_temp2 = d_temp * d_temp;
      stats->var += d_temp2;
      stats->skew += d_temp2 * d_temp;
      stats->kurt += d_temp2 * d_temp2;
    }
    got = fread(buffer, 1, 1024, Fin);
  }
  stats->avg_dev /= stats->size;
  stats->var = (stats->var - correct*correct/stats->size)/(stats->size-1);
  if(stats->var > 0.0) {
    stats->skew /= stats->size *
      stats->var * sqrt(stats->var);
    stats->kurt /= stats->sie*stats->var*stats->var;
    stats->kurt -= 3.0;
  }
  else {
    stats->skew = 0.0;
    stats->kurt = 0.0;
  }

  for(i=0, i<256; i++){
    if(vals[i]){
      stats->diff_vals++;
    }
  }

  fclose(Fin);
  return(0);
}

I get the following errors compileing useing gcc through Cygwin:

$ gcc filestat.c
filestat.c:7: error: syntax error before '{' token
filestat.c:12: error: parse error before '}' token
filestat.c:14: error: parse error before "StatDat"
filestat.c: In function `main':
filestat.c:19: error: `StatDat' undeclared (first use in this function)
filestat.c:19: error: (Each undeclared identifier is reported only once
filestat.c:19: error: for each function it appears in.)
filestat.c:19: error: parse error before "stats"
filestat.c:22: error: `stats' undeclared (first use in this function)
filestat.c:16: warning: return type of `main' is not `int'
filestat.c: At top level:
filestat.c:33: error: parse error before "StatDat"
filestat.c: In function `FileStats':
filestat.c:40: error: `fn' undeclared (first use in this function)
filestat.c:47: error: `stats' undeclared (first use in this function)
filestat.c:53: error: parse error before "int"
filestat.c:102: error: parse error before ')' token
filestat.c: At top level:
filestat.c:108: warning: parameter names (without types) in function declaration

filestat.c:108: warning: data definition has no type or storage class
filestat.c:109: error: parse error before "return"

Well your typedef is missing a ;
and your main is all wrong