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

struct person {
  char  name[10];
  int   age;
  float weight;
};
  
int main() {
  FILE  *fd;  

  // Open the file for writing only
  fd = fopen("sampleFile.txt", "w");
  if (!fd) {
     printf("ERROR: Could not open file\n");
     exit(1);
  }

  // Write out a float
  float  data = 1078.24;
  fprintf(fd, "%f\n", data);
  
  // Write out a string of 30 chars
  char  sentence[30] = "This is a sentence.";
  fprintf(fd, "%-30s\n", sentence);
 
  // Write out a whole array of ints
  int intArray[5] = {12, 34, 56, 78, 90};
  for (int i=0; i<5; i++)
    fprintf(fd, "%d ", intArray[i]);
  fprintf(fd, "\n");

  // Write out first three elements of the array
  for (int i=0; i<3; i++)
    fprintf(fd, "%d ", intArray[i]);
  fprintf(fd, "\n");

  // Write out an array of structs
  struct person friends[4] = {{"Bobby", 19, 143.57}, {"Jenny", 20, 110.32},
			            {"Fredy", 82, 178.29}, {"Marie", 67, 121.32}};
  for (int i=0; i<4; i++)
    fprintf(fd, "%s %d %f\n", friends[i].name,friends[i].age,friends[i].weight);

  // Write out a single friend
  fprintf(fd, "%s %d %f\n", friends[0].name,friends[0].age,friends[0].weight);

  // All done ... close the file
  fclose(fd);
}