This program calculates the total price of a basket of products and determines whether the delivery is free or not based on the basket's total value.

1- Basket List File (PANIER.txt):

• Contains the list of baskets.
• Each record includes a basket key. 2- Product List File (PANPRD.txt):
• Contains the list of products within each basket.
• Each record includes the basket key, product code, and product price.

• Total per Basket File (SortiePanier.txt):
  • Contains the total price, number of products, and delivery status (free, paid, or canceled) for each basket.

• Delivery is free (G) for baskets with a total value exceeding 100€.
• For baskets with no products, delivery is canceled (A).
• For baskets with a total value less than 100€, delivery is paid (P), with a fixed delivery charge of 14.55€.

1- Initialization:

• Open input and output files.
• Initialize variables, counters, and flags. 2- Processing:
• Read each basket and its associated products from the input files.
• Calculate the total price of each basket and determine the delivery status.
• Write the total price, number of products, and delivery status to the output file. 3- Completion:
• Close all files.
• Display summary information, including the number of input records, output records, and encountered errors.
• Terminate the program.

• Sequential file handling is used for input and output operations.
• File status codes (L-Fst-In1, L-Fst-In2, L-Fst-Out, L-Fst-Err) are used for error handling.

• Errors encountered during file operations or processing are logged in the error file (SortieErreur.txt).
• Error messages include details of the erroneous records.

This program provides a solution for calculating the total price of product baskets and determining delivery status based on predefined conditions. It efficiently processes input data, handles errors gracefully, and generates accurate output.