#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
void saveInFile(float *X,int S)
{
  int i;
  FILE *cfPtr;
   if((cfPtr=fopen("arrayInF.txt","w"))==NULL)
      printf("File could not be opened\n");
      else
      {
        fprintf(cfPtr,"%d\n",S);
        for (i=0;i<S;i++)
        {
          fprintf(cfPtr,"%f\n",X[i],i);

        }
      }
    fclose(cfPtr);
}
void readF(float *X, int R)
{
  int i;
  FILE *fp;
  X=malloc(sizeof(int)*(R+1));

   if((fp=fopen("arrayInF.txt","rt"))==NULL)
      printf("File could not be open\n");
      else
      {
          fscanf(fp,"%d",&R);
          printf("%d\n",R);
          for(i=0;i<R;i++)
          {
              fscanf(fp,"%f",&X[i]);
              printf("%f\n",X[i]);
          }
      }
}

float minp(float x[],int size)
{
 float min;
 int i;

 min=x[0];
 for(i=0;i<size;i++)
 {
   if (((x[i]<min) || (min<0)) && (x[i]>=0)) min=x[i];
 }
 return min;
}

void input_array(float x[], int size)
{
 int i;
 printf("Input %d float numbers.\n",size);
 for(i=0;i<size;i++)
 {
 printf("x[%d]=",i+1);
 scanf("%f",&x[i]);
 }
}
int main(void)
{
 float *x,min;
 int s;

 srand(time(NULL));
 s=10-rand()%5;
 x=(float *) malloc(sizeof(float)*s);
 input_array(x,s);
 saveInFile(x,s);
 readF(x,s);
 min=minp(x,s);
 if (min>=0) printf("Min=%f\n",min);
   else
   {
       printf("Vse chisla otricatel`nie\n");
   }
   free(x);

}