Hi there, I am trying to write a code on composite bars for n cross-sections, could someone help me with a simple code.

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Syed Mustaqhim
Syed Mustaqhim 2019-7-24
评论： Syed Mustaqhim 2019-7-25
o = 'Enter the number of cross-sections: ';
n = input(o);
prompt = 'Enter the load in N: ';
F = input(prompt);
if n == 1
y = 'Enter the Youngs modulus of Bar : ';
E1 = input(y);
b = 'Enter the length of Bar: ';
L1 = input(b);
s = 'Enter the diameter of Bar: ';
D1 = input(s);
A = (pi*(D1^2)/4);
Delta = ((F*L1)/(A*E1))
fprintf(' Total extension of the bar: %s.\n' ,Delta );
elseif n==2
y = 'Enter the Youngs modulus of Bar 1: ';
E1 = input(y);
z = 'Enter the Youngs modulus of Bar 2: ';
E2 = input(y);
b = 'Enter the length of Bar 1: ';
L1 = input(b);
d = 'Enter the length of Bar 2: ';
L2 = input(d);
s = 'Enter the diameter of Bar 1: ';
D1 = input(s);
f = 'Enter the diameter of Bar 2: ';
D2 = input(f);
A1 = (pi*(D1^2)/4);
A2 = (pi*(D2^2)/4);
delta1 = ((F*L1)/(A1*E1))
delta2 = ((F*L2)/(A2*E2))
Delta = delta1 + delta2;
fprintf(' Total extension of the bar: %s.\n' ,Delta );
This is the code for 2 cross-sections, the goal is to extend this to n cross-sections. Still learning.

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采纳的回答

Raj
Raj 2019-7-24
编辑：Raj 2019-7-24
Use this:
o = 'Enter the number of cross-sections: ';
n = input(o);
prompt = 'Enter the load in N: ';
F = input(prompt);
A=zeros(n,1);%preallocate A
Delta=A;%preallocate Delta
for ii=1:n
fprintf('Enter the Youngs modulus of Bar %i : \n',ii);
E = input('y=');
fprintf('Enter the length of Bar %i: \n',ii);
L = input('b=');
fprintf('Enter the diameter of Bar %i:\n',ii);
D = input('s=');
A(ii,1) = (pi*(D^2)/4);
Delta(ii,1) = ((F*L)/(A(ii,1)*E));
end
for jj=1:n
fprintf(' Total extension of the bar %i: %f. \n' ,jj,Delta(jj,1) );
end

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