s#include

#include

#include

#include

using namespace std;

char getGradeLetter$($float grade$)\{$

if $($grade $>=90\mathrm{.}0)$ return $\text{'}$A$\text{'}$;

if $($grade $>=80\mathrm{.}0)$ return $\text{'}$B$\text{'}$;

if $($grade $>=70\mathrm{.}0)$ return $\text{'}$C$\text{'}$;

if $($grade $>=60\mathrm{.}0)$ return $\text{'}$D$\text{'}$;

return $\text{'}$F$\text{'}$;

$\}$

int main$()\{$

ifstream inFile$("$grades$.$txt$")$;

ofstream outFile$("$statistics$.$csv$")$;

if $(!$inFile.is$\_$open$())\{$

cerr $<<$ "Error opening input file!" $<<$ endl;

return $1$;

$\}$

if $(!$outFile.is$\_$open$())\{$

cerr $<<$ "Error opening output file!" $<<$ endl;

return $1$;

$\}$

string name;

float grade;

map count $=\{\{\text{'}$A$\text{'},0\},\{\text{'}$B$\text{'},0\},\{\text{'}$C$\text{'},0\},\{\text{'}$D$\text{'},0\},\{\text{'}$F$\text{'},0\}\}$;

while $($inFile $>>$ name $>>$ grade$)\{$

char gradeLetter $=$ getGradeLetter$($grade$)$;

count$[$gradeLetter$]++$;

$\}$

$//$ Output to terminal

for $($const char grade : $\{\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'},\text{'}$D$\text{'},\text{'}$F$\text{'}\})\{$

cout $<<$ count$[$grade$]<<""<<$ grade $<<$ endl;

$\}$

$//$ Output to statistics.csv

outFile $<<$ "Grade,NumStudents

$"$;

for $($const char grade : $\{\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'},\text{'}$D$\text{'},\text{'}$F$\text{'}\})\{$

outFile $<<$ grade $<<","<<$ count$[$grade$]<<"$

$"$;

$\}$

inFile.close$()$;

outFile.close$()$;

return $0$;

$\}$

$1.$

$----------------------------$

HW$4$A $-$ Compilation Test $(0/0)$

$2.$ COMPILATION SUCCESSFUL!!

$3.$

$4.$ Input File $-$ grades.txt

$5.$

$6.$ Kelden Amadiro $57$

$7.$ Daneel Olivaw $89\mathrm{.}0$

$8.$ Elijah Baley $84$

$9.$ Giskard Reventlov $88\mathrm{.}8$

$10.$ Alfred Lanning $68$

$11.$ Susan Calvin $94$

$12.$ Han Fastolfe $92$

$13.$ Gregory Powell $73$

$14.$ Mike Donovan $67$

$15.$ Laurance Robertson $76$

$16.$ Hari Seldon $98$

$17.$ Dors Venabili $82$

$18.$ Eto Demerzel $89\mathrm{.}0$

$19.$ Raych Seldon $78$

$20.$ Salvor Hardin $86$

$21.$ Yugo Amaryl $96$

$22.$ Ebling Mis $87$

$23.$ John Watson $43$

$24.$ Sherlock Holmes $92$

$25.$ Violet Crawley $83$

$26.$ Greg Lestrade $74$

$27.$ Missus Hudson $85$

$28.$ Jim Moriarty $99\mathrm{.}99999999999$

$29.$ Molly Hooper $65$

$30.$ Irene Adler $91$

$31.$ Mycroft Holmes $82$

$32.$ Tom Branson $83$

$33.$ John Bates $89$

$34.$ Mister Carson $79$

$35.$ HW$4$A $-$ Output File $-$ 'statistics.csv$\text{'}(1/1)$

$36.$ PASSED!! Found output File 'statistics.csv$\text{'}$

$37.$ HW$4$A $-$ Contents of 'statistics.csv$\text{'}(0/6)$

$38.$ Grade,NumStudents

$39.-$ A$,0$

$40.-$ B$,0$

$41.-$ C$,0$

$42.-$ D$,0$

$43.-$ F$,0$

$44.+$ A$,7$

$45.+$ B$,12$

$46.+$ C$,5$

$47.+$ D$,3$

$48.+$ F$,2$

$49.$

$50.$ FAILED!! Contents of 'statistics.csv$\text{'}$ are incorrect.

$51.$

$52.$ Test Failed: False is not true :

$53.$ HW$4$A $-$ Terminal Output $($I$/$O Formatting$)(0/2)$

$54.-0$ A

$55.-0$ B

$56.-0$ C

$57.-0$ D

$58.-0$ F

$59.+7$ A

$60.+12$ B

$61.+5$ C

$62.+3$ D

$63.+2$ F

$64.$

$65.$ FAILED!!

$66.$

Test Failed: False is not true :

$--------------------------------------------$

Kelden Amadiro $57$

Daneel Olivaw $89\mathrm{.}0$

Elijah Baley $84$

Giskard Reventlov $88\mathrm{.}8$

Alfred Lanning $68$

Susan Calvin $94$

Han Fastolfe $92$

Gregory Powell $73$

Mike Donovan $67$

Laurance Robertson $76$

Hari Seldon $98$

Dors Venabili $82$

Eto Demerzel $89\mathrm{.}0$

Raych Seldon $78$

Salvor Hardin $86$

Yugo Amaryl $96$

Ebling Mis $87$

$---------------------------$

Problem A: Making the grade $(5$ points$)$

The file grades.txt contains a list of names with grades, separated by spaces. Note that the grades may contain decimal values.

John Watson $43$

Sherlock Holmes $92$

Violet Crawley $83$

$...$

Write a program that reads in the grades from $$grades$.$txt$$ and then outputs the distribution of letter grades to the terminal. Have your program also create an excel$-$friendly, comma delimited file called $$statistics$.$csv$$ that contains the grade distribution. The necessary format for both the terminal output and statistics.csv are shown in the examples below.

Your program should read in the grade for each person, then determine their letter grade using the breakdown shown here. These grade boundaries are inclusive, so an A is anything $>=90\mathrm{.}0.$

Grade A B C D F

Min $\%908070600$

Your program should display the distribution of letter grades to the terminal, as shown in the $$Example Terminal Output$$ below and create a similar excel$-$friendly file called statistics.csv$,$ shown in $$Example File Output$$ below. Make sure to match the format in the examples below exactly. Notice that the format is different between the terminal output and the $.$csv output, so double check that you are using the correct format for each.

Example Terminal Output

$3$ A

$5$ B

$2$ C$$

$1$ D

$1$ F

Example File Output $($statistics$.$csv$)$

Grade,NumStudents

A$,3$

B$,5$

C$,2$

D$,1$

F$,1$