Letter Grade: Write a C$++$ program which will prompt a user to enter a test score, which may be a

floating point number. It should print out the following outputs, depending on the user input:

Output

"Invalid score"

"Invalid input"

F

D

C

B

A

A$+$

Input Range

$<mn>0</mn>$

non$-$numeric value

$0=$ input $<mn>6</mn><mn>0</mn>$

$60$ input $<mn>7</mn><mn>0</mn>$

$70$ input $<mn>8</mn><mn>0</mn>$

$80$ input $<mn>9</mn><mn>0</mn>$

$90$ input $<mn>1</mn><mn>0</mn><mn>0</mn>$

$100$ input

The screen dialog should look something like $($where user input is shown in underlined italics$)$:

Test Grading Program.

Enter a numeric score: $\{$

The grade for a $50\mathrm{.}5$ is F$.$