A delimiter is a sequence of one or more characters used to specify the boundary between separate, independent regions in plain text or other data streams. An example of a delimiter is the comma character, which acts as a field delimiter in a sequence of comma-separated values
A field indicator or a delimeter, as it can be called, can be used to indicate where fields end. In a spreadsheet or a database it can be used a guide when importing data to help put it into the correct columns.
the getchar function waits the user hit a key followed by return key. Upon the return key hitted by the user the function returns the key. But the scanf can be used for various & different user entered data including text, integer, float and so on. in spite of getchar the delimeter keys for scanf function are tab, space and return key; so when a space entered by the user in the input the scanf will end the input and waits user enter the return key. You must take in mind that just the fragment of input that is behind these delimeters will be considered as legal input for the scanf and the remaninder will be escaped.
To create a program that accomplishes this task, you can follow these steps: Read the text input. Use regular expressions or string manipulation techniques to identify and extract all the single-digit numbers from the text. Replace each single-digit number with its corresponding word using a lookup table or a switch statement. Display the modified text with the numbers converted to words.