Multiplication Grid to a File

Write a function void writeGrid(const string& filename, int n) that opens filename with an ofstream and writes an n by n multiplication table. Row i (from 1 to n) contains the products i*1, i*2, ..., i*n, each written right-aligned in a field 3 characters wide (setw(3)) with no other separator, followed by a newline.

For writeGrid("grid_a.txt", 3) the file must contain:
  1  2  3
  2  4  6
  3  6  9

Do NOT write a main function.

Expected Output:

  1  2  3↵
  2  4  6↵
  3  6  9↵
  1  2  3  4↵
  2  4  6  8↵
  3  6  9 12↵
  4  8 12 16↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

Streamsofstream

Code Editor

Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (cout, fori)

Your Output

Run your code to see the output here...

Test Cases

Run your code to see test case results.