Question

Write a program **(IN C)** that displays all the phone numbers in a file that match the area code that the user is searching for. The program prompts the user to enter the phone number and

the name of a file. The program writes the matching phone numbers to the output file.

For example,

Enter the file name: phone_numbers.txt

Enter the area code: 813

Output: encoded words are written to file: 813_phone_numbers.txt

The program reads the content of the file and looks for phone numbers that match the area code entered by the user.

The output file name should be the same name as the input file but with an added area code at the beginning of the file name.

For example, if the original file name is abc.txt and the area code is 615, the output file name is then 615_abc.txt.

Assume the filename is no more than 100 characters. Assume the length of each line in the input file is no more than 100 characters.

Assume the input file contains no more than 1000 lines.

In the program, you should include the following function.

int search(char *area_code, char * phone_number );

The function expects area_code to point to a string containing the area code as a string and phone_number to point to a string containing the phone number as a string

Phone numbers in the file have the format of (###)###-####.

For example, (813)123-4567.

The function returns 1 if the phone number matches the area code , returns 0 otherwise.

The main function should handle file input and output. The main function calls the search

function to determine if a phone number in the input file matches the area code and write the phone number to the output file if it does.

Answer 1

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