initial commit / add all books

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+//example 9.1
+clc;
+clear;
+close ;
+//s = input ('Enter the number to be serially shifted in to the shift register');
+s=0100; // given serial input
+for i = 4:-1:1
+    se(i) =modulo(s,10);
+    s=s/10;  
+    s=round(s);
+end
+se(i+4)=0;
+k=0;
+for i = 2:6  // making state table  
+    clk(k+1) = k;
+    q(i)=se(i-1);
+    if i>1 then
+        r(i) = q(i-1);
+    else
+        r(i) =0;
+    end;
+    if i>2 then
+        s(i) = r(i-1);
+    else
+        s(i) =0;
+    end;
+    if i>3 then
+        t(i) =s(i-1);
+    else
+        t(i) =0;
+    end;
+    k=k+1; 
+end
+for i = 1 : 5 // printing the state table 
+        Y(i,1)=clk(i);
+        Y(i,2)=se(i);
+        Y(i,3)=q(i);
+        Y(i,4)=r(i);
+        Y(i,5)= s(i);
+        Y(i,6)=t(i);
+        end
+disp('The state table  is :');
+disp('Clock  Input   Q     R     S     T');
+disp(Y);
+