Please teach me how to write c code to get this output

NOTE that the function fgets() used with the stdin stream will read a string until end of line and add a at the end of the string. This will reliably determine if an empty string was entered.

A typical use of the function to read customer data is:

Enter your first name: John

Enter your last name: Invalid Entry: Enter your last name: Smith

Enter your street address: 35 Elm St.

Enter your city: Toronto Enter your province: ON

Enter your postal code:m2e44x

Invalid Entry: Enter your postal code: m2e 4x4

You entered:

John Smith 35 Elm St.,

Toronto, ON,

M2E 4X4