In for loop, All the students are getting same grades?

2016 10 31
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更新时间：2016 11 6
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Hello, I was making code to sum, average and grade students based on marks of Maths, Chemistry and Physics. Sum and average is done but grading is not working. It is returning same grade to all students. Kindly Help, Regards.

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Adam
Adam 2016-10-31
How are we supposed to help if you don't provide us with any code that you are using?! You could be doing any one of a number of things incorrectly.

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 采纳的回答

Adam
Adam 2016-10-31
编辑：Adam 2016-10-31

1 个投票

You made the same mistake that people in the past have made asking this very same question.
Sum is an array so in a loop you need to use
Sum(i)
in all your elseif statements. You have a for loop looping round variable i, but you don't use i so you basically do the same thing every time round the loop.
There are neater ways to do it, but I'll ignore those for now and just do the minimal correction to the code you have.

更多回答（1 个）

Muhammad Maaz Bin Tahir
编辑：Adam 2016-10-31

0 个投票

clear all
clc
C=input('Marks of students in Chemistry = ');
P=input('Marks of students in Physics = ');
M=input('Marks of students in Maths = ');
Sum = C + P + M ;
for n=1:size(C);
fprintf('Total Marks of Student = %0.2f\n', Sum);
end
AVG= (C+P+M)/3 ;
for n=1:size(C);
fprintf('Average Marks of Student = %0.2f\n', AVG);
end
for i= 1 : length(Sum);
if Sum>=275
fprintf('The grade of Student is "A-1",\n')
else if Sum>=250;
fprintf('The grade of Student is "A",\n ')
else if Sum>=225;
fprintf('The grade of Student is "B",\n')
else if Sum>=200;
fprintf('The grade of Student is "C",\n')
else if Sum>=175;
fprintf('The grade of Student is "D",\n')
else if Sum>=150;
fprintf('The grade of Student is "E",\n')
else
fprintf('The grade of Student is "F",\n')
end
end
end
end
end
end
end

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Adam
Adam 2016-10-31
Please add this as a comment of the original question or edit it into the question. It isn't an answer.

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