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// level 3.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

void get_field(FILE *ptr, char *name, int length);


int _tmain(int argc, _TCHAR* argv[])
{
	char cnumber[3];
	char company[34];
	char ABN[12];
	char street[35];
	char suburb[23];
	char state[6];
	char postcode[8];
	char phone[12];
	char sale[3];
	char description[44];
	char part[7];
	char cost[10];
	char date[6];
	FILE *cust_in, *sales_in;
	cust_in=fopen("", "r");

	int i;      
	for(i=1; i<11; i++) {	// for loop.. number of customers is 10
		int m = (135* i );
		fseek(cust_in,m,SEEK_SET); // fseek change the file position
									// reads from customer file seperate array
		get_field(cust_in, cnumber, 3);
		get_field(cust_in, company, 34);
		get_field(cust_in, ABN, 12);
		get_field(cust_in, street, 35);
		get_field(cust_in, suburb, 23);
		get_field(cust_in, state, 6);
		get_field(cust_in, postcode, 8);
		get_field(cust_in, phone, 12);

		//display customer details
		printf("TOF ---------\n\n\n");
		printf("ABN %s\n", ABN);
		printf("%s\n", company);
		printf("%s\n", street);
		printf("%s\t %s\t %s\n\n", suburb, state, postcode);
		printf("%s\n\n\n\n", phone);

		int cust_key=atoi(cnumber) ;// ascii to integer
		sales_in=fopen("t","r");
		float total = 0; 
			for(int k=1; k<200; k++) {
				//postions the cursor
				int u=k * 72;
				fseek(sales_in,u,SEEK_SET);
				get_field(sales_in, sale, 3);
				int sales_key = atoi(sale);   //matching sales keys enter into array
				if (sales_key == cust_key) 
				{
				get_field(sales_in, description, 44);
				get_field(sales_in, part, 7);
				get_field(sales_in, cost, 10);
				get_field(sales_in, date, 6);  // sales keys matching gets entered into array
				
				float price= atof(cost); // string into a numerical representation
				printf("%s %s $ %1.2f %s/08/06 \n", description, part, price, date);
				
				total =+price;
			}
			fseek(sales_in,0,SEEK_SET);
		}
			printf("\t\t Total Invoice: %1.2f \n\n", total);
			fclose(sales_in);
			fseek(cust_in,0,SEEK_SET);
	}

	fclose(cust_in);

	return 0;
}




		

void get_field(FILE *ptr, char *name, int length)
{
	fread(name, length, 1, ptr);
	name[length]='\0';

	return;
}