Chapter 7.1, Problem 3SC

Explanation of Solution

Way to achieve the task:

• Initially, open the existing file and add the number to an array.
• Then close that file.
• Now, the variable “total” is assigned as “0”...

Explanation of Solution

Pseudo-code:

• Open a scanner for the file
• For each number in the scanner
  • Add the number to an array
• Close the scanner
• Set total to 0
• Open a print writer for the file
• For each number in the array
  • Write the number to the print writer
  • Add the number to total
• Write total to the print writer
• Close the print writer...