lab1hw.c file reading completed

lab_1/lab1hw.c

 /*
 Lab I HW1
+file - http://innar.com/similarity/data.txt
+So, the first week's task is to read in the file and out the read in values into arrays.
+Structure is as follows - person_id,book_id
+Each represents an unique identificator number to differentiate. The data shows who bought what book.
+
+After the data has been read in, find the following info and connections from the provided data:
+
+    1. How many people bought book x.
+    2. How many bought bought both x and y together.
+    3. Cross-table of different books for each possible combination.
+    4. Calculate the odds for the book buying. (Use the result from 3. and divide by count of the book bought)
 */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define NFIELD 908576
+#define FNAME "data.txt"
+
+typedef struct sales
+{
+  int person_id;
+  int book_id;
+} sales_t;
+
+void readFile(sales_t *);
+
+int main(void)
+{
+  sales_t data[NFIELD];
+
+  readFile(data);
+
+  return 0;
+}
+
+void readFile(sales_t *sp)
+{
+  FILE *fp;
+  char s[20];
+  int i;
+
+  fp = fopen(FNAME,"r");
+  if (fp == NULL)
+  {
+    printf("file cannot be opened\n");
+  }
+
+  fscanf(fp, "%s\n", s);
+
+  for(i = 0; i < NFIELD; i++)
+  {
+    fscanf(fp, "%d,%d\n", &(sp+i)->person_id,&(sp+i)->book_id);
+  }
+
+  fclose(fp);
+
+
+  return;
+}