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Description
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Write a function that will take in an array of student <tt>scores</tt> between <tt>0</tt>
and <tt>100</tt> along with the <tt>size</tt> of the array and a <tt>totals</tt> array of 5 elements where the 0th represents the total number of As in the class, the 2nd represents the number of Bs, ...,
while the 4th represents the number of Fs. Your function may assume the 5 element
array is initialized to 0s. It should then count the total number of As, Bs, Cs, Ds, and Fs. The range for each letter grade are given below:

<table>
<tr><th>Range</th><th>Letter Grade</th></tr>
<tr><td>90-100</td><td>A</td></tr>
<tr><td>80-89</td><td>B</td></tr>
<tr><td>70-79</td><td>C</td></tr>
<tr><td>60-69</td><td>D</td></tr>
<tr><td>0-59</td><td>F</td></tr>
</table>

Rather than write a lot of <tt>if..else if</tt> statements, use them only for <tt>100</tt> and values <tt>49</tt> or below.
Consider how you could use math to convert the decade ranges 90-99, 80-89, ..., 50-59 to the correct index of the <tt>totals</tt> array.
Write a table to show the input and the desired output.
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Copied from problem cpp/arrays/reverse (author: redekopp@usc.edu)
Copied from problem cpp/cs103/hw-arrays/reverse_copy (author: redekopp@usc.edu)

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Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

Template / Reference solution

#include <iostream>
using namespace std;

void letterGrades(int scores[], int size, int totals[])
{
\[
REDACTED
]\
}

int main()
{
int scores[50];
int n = 0, num;
// Track number of As, Bs, Cs, Ds, and Fs
int totals[5] = {0,0,0,0,0};

// Get all the scores
cin >> num;
while(num != -1){
scores[n++] = num;
cin >> num;
}

// Call the letterGrades function to compute
// the total As, Bs, ...
letterGrades(scores, n, totals);

// Output the results
char letter = 'A';
for(int i=0; i < 5; i++){
cout << letter << ": " << totals[i] << endl;
if(letter == 'D'){
letter += 2;
}
else {
letter++;
}
}

return 0;
}
Java test suite
See manual

C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]
to just run once with no input use [{}]

[
{"stdin": "100 90 80 70 60 50 51 52 93 99 -1"},
{"stdin": "80 81 82 83 84 63 62 61 59 100 -1"},
{"stdin": "10 20 30 40 50 60 70 80 90 100 95 -1"}
]

C++ test suite
See manual

Forbidden substrings
json list of strings
e.g. ["for","while"]

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Solution visibility remove
Java imports
json list of importables
e.g. ["java.util.*"]

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Override Java classname
else defaults to
websheet name
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Dependent on other websheets?
json list of websheet names in this folder
e.g. ["DataStructure"]

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Is example?
i.e., just a demo
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Add compiler flag(s)
json list of flags
e.g. ["-Wno-unused-variable"]

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Remove default compiler flag(s)
json list of flags
see default_cppflags
e.g. ["-Wno-write-strings"]

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Property	Value
Description html markup shown to student	<p>Write a function that will take in an array of student <tt><strong>scores</strong></tt> between <tt>0</tt> and <tt>100</tt> along with the <tt><strong>size</tt></strong> of the array and a <tt><strong>totals</strong></tt> array of 5 elements where the 0th represents the total number of As in the class, the 2nd represents the number of Bs, ..., while the 4th represents the number of Fs. Your function may assume the 5 element array is initialized to 0s. It should then count the total number of As, Bs, Cs, Ds, and Fs. The range for each letter grade are given below:</p> <table> <tr><th>Range</th><th>Letter Grade</th></tr> <tr><td><strong>90-100<strong></td><td>A</td></tr> <tr><td><strong>80-89<strong></td><td>B</td></tr> <tr><td><strong>70-79<strong></td><td>C</td></tr> <tr><td><strong>60-69<strong></td><td>D</td></tr> <tr><td><strong>0-59<strong></td><td>F</td></tr> </table> <p>Rather than write a lot of <tt>if..else if</tt> statements, use them only for <tt>100</tt> and values <tt>49</tt> or below. Consider how you could use math to convert the decade ranges 90-99, 80-89, ..., 50-59 to the correct index of the <tt>totals</tt> array. <strong>Write a table to show the input and the desired output.</strong></p>
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	Copied from problem cpp/arrays/reverse (author: redekopp@usc.edu) Copied from problem cpp/cs103/hw-arrays/reverse_copy (author: redekopp@usc.edu) remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution
Template / Reference solution	#include <iostream> using namespace std; void letterGrades(int scores[], int size, int totals[]) { \[ REDACTED ]\ } int main() { int scores[50]; int n = 0, num; // Track number of As, Bs, Cs, Ds, and Fs int totals[5] = {0,0,0,0,0}; // Get all the scores cin >> num; while(num != -1){ scores[n++] = num; cin >> num; } // Call the letterGrades function to compute // the total As, Bs, ... letterGrades(scores, n, totals); // Output the results char letter = 'A'; for(int i=0; i < 5; i++){ cout << letter << ": " << totals[i] << endl; if(letter == 'D'){ letter += 2; } else { letter++; } } return 0; }
Java test suite See manual
C++ test suite json list of stdin/args tests e.g. `[{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]` to just run once with no input use `[{}]`	[ {"stdin": "100 90 80 70 60 50 51 52 93 99 -1"}, {"stdin": "80 81 82 83 84 63 62 61 59 100 -1"}, {"stdin": "10 20 30 40 50 60 70 80 90 100 95 -1"} ]
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	remove

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