initial commit / add all books

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diff --git a/45/CH6/EX6.7/example_6_7.sce b/45/CH6/EX6.7/example_6_7.sce
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+//example 6.7 
+clc;
+clear; 
+a=0;
+b=0;
+q=0;
+//aa=input(" Enter the first no (in decimal) :");
+//bb=input(" Enter the number from which first no has to substracted:");
+aa=175;
+bb=118;
+while(aa>0)    // converting the inputs in to binary numbers 
+    x=modulo(aa,2);
+    a= a + (10^q)*x;
+    aa=aa/2;
+    aa=floor(aa);
+    q=q+1; 
+end
+q=0;
+while(bb>0)             
+    x=modulo(bb,2);
+    b= b + (10^q)*x;
+   bb=bb/2;
+    bb=floor(bb);
+    q=q+1; 
+end
+printf(' \n The binary equivalent of first no is %f\n\n',a);
+printf(' The binary equivalent of secnd no is %f\n\n',b);
+for i=1:8
+    a1(i)=modulo(a,10);
+    a=a/10;
+    a=round(a);
+    b1(i)=modulo(b,10);
+    b=b/10;
+    b=round(b);
+end
+
+car(1)=0;
+for i=1:8
+    c1(i)=car(i)+a1(i)+ b1(i);//adding the binary numbers (binary addtion)
+    if c1(i)== 2 then
+        car(i+1)= 1;
+        c1(i)=0;
+    elseif c1(i)==3 then 
+         car(i+1)= 1;
+        c1(i)=1;
+    else 
+        car(i+1)=0;
+    end
+end
+c1(9)=car(9);
+re=0;
+format('v',18);
+for i=1:8
+    re=re+(c1(i)*(10^(i-1)))   
+end
+printf('If only 8 bits are taken the result will be as shown below \n\n');
+printf(' and the sum of given two binary numbers will be %f\n\n',re );
+q=1;
+b=0;
+f=0;                
+a=re;
+while(a>0) //converting the binary output to hexadecimal
+    r=modulo(a,10);
+    b(1,q)=r;
+    a=a/10;
+    a=floor(a);
+    q=q+1;
+end
+for m=1:q-1
+     c=m-1;
+    f = f + b(1,m)*(2^c);
+end
+printf(' Sum in decimal notation is %d\n\n',f);
+hex=dec2hex(f);
+printf(' The sum in hexadecimal notation is %sH \n',hex);
+printf(' \n with an overflow of %d\n\n',car(9));
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