plot complex exponential fourier series

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yazeed Alshorman 2016-4-9

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https://ww2.mathworks.cn/matlabcentral/answers/278122-plot-complex-exponential-fourier-series

Hi, I'm new in MATLAB program and I need some help to solve my homework. my homework say : plot complex exponential fourier series using MATLAB where the user input the value of amplitude A, fundamental period and value of N where the summation limit between -N,N. then the program will plot curve for summation limit between -1,1. then for summation between -2,2. and increase N value to reach to summation limit between -20,20. I don't know if that right way to write code, but this is code that I wrote it, please help me.

   clear
  clc
  A=input('Enter A: ');
  T0=input('Enter T0: :');
  N=input('Enter N: ');
  W0= 2*pi/T0;
  t=linspace(100,100,10000);
suma=0;
for n=-N:N %%n could be any number, bigger n - better approximation
    B= integral(1*exp(-1i*n*W0*t),0,T0);
    cn=(1/T0)*B;
    suma = suma + (cn*exp(1i*n*W0*t));
end
plot(t,suma)
grid