What are the uses of the getline function in C++?

The main applications of the getline function in C++ are as follows:

1. Read file content: You can use the getline function to read the content of the file line by line, saving each line to a string variable for easy processing of the file content. For example, you can use getline to read user configuration information from a file.
2. To read user input: You can use the getline function to read input from the standard input stream and save it into a string variable. Unlike cin, getline can read entire lines of content including spaces. For example, you can use getline to parse parameter values from user input in command line arguments.
3. Handling Strings: The getline function can be used to process strings, such as splitting or extracting from strings. For example, you can use the getline function to extract multiple values separated by commas from a string.
4. Using stringstream in combination: You can use the getline function in combination with stringstream to split a string into multiple substrings based on a specified delimiter. For example, you can use getline and stringstream to split a comma-separated string into multiple substrings for further processing.

In conclusion, the getline function in C++ is widely used for scenarios that require reading file contents line by line, reading user input, and processing strings.