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+clc;

+clear all;

+//chapter 3

+//page no 82

+//example 3.3

+A=20;    //Volts

+T=1*10^-3;    //second

+function Vf=Fourier_transform(f,T,A)

+    if f==0 then

+        Vf=A*T;

+    else

+        Vf=A*T*sin(%pi*f*T)/(%pi*f*T);

+        

+    end

+endfunction

+mprintf('(a)Equation for fourier transform is \n V(f)=%.2f*sin(%.3f*pi*f)/(%.3f*pi*f)',A*T,T,T);

+//Part b Calculation

+f=[0 500 1000 1500];

+for i=1:4

+    Vf(i)=Fourier_transform(f(i),T,A)

+end

+//Part c calculation

+RdB=20*log10(Vf ./ .02)

+//Result Table

+mprintf('\nf(Hz)     V(f)in V     RdB\n')

+for i=1:4

+    mprintf('%5i   %f    %f \n',f(i),Vf(i),RdB(i))

+end

+//All values are precise