How do i extract data from an excel file and use it in a c program?

[Agnel]

I have data (a 2D array) in Excel. I need to import the data to my program in C and use it in the logic. Then I also want to store my final answer in another excel file.
How do i go about this?

[weaknessforcats]

You will need to export your Excel spreadsheet to a file and read that file into your C program. The C program can output the result in a file format readable by Excel.

In Excel, select File then Export and then choose the file format you wish to use. (Excel 2016).

[Agnel]

By file do you mean a .txt file?

[weaknessforcats]

A .txt file is one option. There is also the .csv file for comma-separated-values. A .csv file is handy because all the values ae between commas so you can parse the file in the C program.

Check your Excel export file types options.