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How to make a function that tell us about grades using Matlab

116 次查看（过去 30 天）
Muhammad Usman Saleem
编辑： Muhammad Usman Saleem 2022-10-29
Hi every one; I going to make a function called letter_grade that takes a positive integer called score as its input argument and returns a letter grade according to the following scale: A: 91 and above; B: 81-90; C: 71-80; D: 61-70; F: below 61. Remember that to assign a letter to a variable, you need to put it in single quotes, as in: grade = 'A'. when i run the below codes i got grade 'B' for score 95.which in not correct.Kindly guide me how can i correct this code. Please vote up if this question help!
function grade=letter_grade(n)
if n >= 91 && n>=100
grade='A';
elseif n >= 81 && n>=90
grade='B';
elseif n >= 71 && n>=80
grade='C';
elseif n >= 61 && n>=70
grade='D';
elseif n <61
grade='F';
end
end
  2 个评论
Murali Krishna
Murali Krishna 2015-5-26
Grade B is defined when n is between 81 and 90 both inclusive. if n>81 and n<=90 grade should be B. But in your code you have written the condition as n>=81 and n>=90. The same error is for finding other grades.
Jan
Jan 2018-12-28
@Goshom Brian and Qahar Mustafa: Please do not use flags to post comments. Thanks.

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采纳的回答

Image Analyst
Image Analyst 2015-5-26
Try it this way:
function grade=letter_grade(n)
if n >= 91
grade='A';
elseif n >= 81
grade='B';
elseif n >= 71
grade='C';
elseif n >= 61
grade='D';
else
grade='F';
end
end
  4 个评论
显示 2更早的评论
Image Analyst
Image Analyst 2021-7-1
@Muhammad Aamir Hayat, did you try it yourself first? I imagine you did. Did you get something like this:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
for n = 55:10:95
grade=letter_grade(n);
fprintf('A score of %d is an "%s".\n', n, grade);
end
fprintf('Done! Thanks Image Analyst!\n');
%=========================================================================
function grade=letter_grade(n)
n2 = floor( (n-1) / 10);
switch n2
case {9, 10}
grade='A';
case 8
grade='B';
case 7
grade='C';
case 6
grade='D';
otherwise
grade='F';
end
end
A score of 55 is an "F".
A score of 65 is an "D".
A score of 75 is an "C".
A score of 85 is an "B".
A score of 95 is an "A".
Done! Thanks Image Analyst!

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更多回答（1 个）

SY
SY 2021-8-4
What's the meaning of this program?
function [Average, StandardDeviation ] = F1_91(Scores)
% Prompt user to input grades(scores)
Scores = input('Enter Grades: ');
%Calculating average of grades
X = mean(Scores)
% Rounding off to nearest integer
Average = round(X)
% Calculating standard deviation of grades
SDD = std(Scores)
% Rounding off to nearest integer
StandardDeviation = round(SDD)
end
  2 个评论
Image Analyst
Image Analyst 2021-8-5
It simply computes the rounded standard deviation of a set of rounded numbers. Not sure what you mean by "meaning"? It's probably someone's homework answer.
Walter Roberson
Walter Roberson 2021-8-5
It is someone's wrong homework answer at that. It should not pass in Scores and then overwrite Scores with the input()

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