Sorting float numbers

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void Sorting(float arr_param[],int size_param);
void swap(float *left_param, float *right_param);
 int main(int argc, char const *argv[])
 {
    FILE*fp=fopen("da.txt","r");
    int BrElements=0,index=0;
    float* allElements;
    float floatElement;
    allElements=(float*)malloc(sizeof(float)*1);
    while(fscanf(fp,"%f ",&floatElement)!=EOF)
      {
          allElements=(float*)realloc(allElements,(++BrElements)*sizeof(float));

    if(allElements==NULL)
    {
      printf("Memory allocation failed\n");
    }
          allElements[index]=floatElement;
          index++;
      }
      int i;
      for(i=0;i<index;i++)
      printf("\n%g ",allElements[i]);
      Sorting(allElements,index);
      printf("\nnew Element\n");
      for(i=0;i<index;i++)
      printf("\n%g ",allElements[i]);
      free(allElements);
      fclose(fp);
  return 0;
}
void Sorting(float arr_param[],int size_param)
{
  int index_main; //Main index
  int index_sec;  //Secondary index

  for (index_main = 0 ; index_main < (size_param - 1); index_main++)
  {
    for (index_sec = 0 ; index_sec < size_param - index_main - 1; index_sec++)
    {
      if (arr_param[index_sec] > arr_param[index_sec+1])
      {
        swap(&arr_param[index_sec], &arr_param[index_sec+1]);
      }
    }
  }
}
void swap(float *left_param, float *right_param)
{
  float temp_var = 0.0;
  temp_var = *left_param;
  *left_param = *right_param;
  *right_param = temp_var;
}