How to solve this...from the code below:

Prompt user to enter three input values from DevC++ and write to text file. Please enter three values :10 20 30 Now writing data to the file. Done. NumericData.bct - Notepad File Edit Format View Help 10 20 30 Example 1 2) Read from (Input file operation) Read from created output file (NumericData.txt) and include file error operation Display as expected output . . Program Output Here are the numbers: 10 20 30 Their sum is: 60 Example 2 Please enter three values : 30 40 50 llow writing data to the file. Press any key to continue Here are the numbers : 30 40 50 Their sum is: 120 Please enter three values : 1 2 3 Now writing data to the file. Press any key to continue Input file could not be openedl Terminating! or Example 3 1 //This program writes data to a file 2 #include 3 #include