sandbox-c/write-location-file/main.c

#include<stdio.h>

/*use macro extern int errno*/
#include <errno.h>
#include <string.h>

#include "write-location-file.h"

int main()
{
  FILE *fp;

  /*latitude e.g. 52.26594*/
  char lat [9];

  /*longitude e.g. 10.52673*/
  char lon [9];

  printf("\nStart...\n");

  fp = fopen("location.csv", "w");
  if (fp==NULL)
  {
    /*failed to open file and associate stream*/
    fprintf(stderr, "Value of errno: %d\n", errno);
    fprintf(stderr, "Error opening file: %s\n", strerror(errno));
  }

  printf("\nEnter latitude: ");
  /*read from stdin*/
  scanf(" %8s", lat);
  printf("\nlat: %s", lat);

  printf("\nEnter longitude: ");
  scanf(" %8s", lon);
  printf("\nlon: %s", lon);

  fprintf(fp, "%8s,%8s\n", lat, lon);
  fclose(fp);

  write_location_file("52.26594", "10.52673");

  printf("\nDone!\n");
  return 0;
}