initial commit / add all books

11 files changed, 512 insertions, 0 deletions

diff --git a/1241/CH3/EX3.1/exa3_1.sce b/1241/CH3/EX3.1/exa3_1.sce
new file mode 100755
index 000000000..179edb64e
--- /dev/null
+++ b/1241/CH3/EX3.1/exa3_1.sce
@@ -0,0 +1,55 @@
+//Example 3-1//

+//BCD addition//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=647

+b=492

+for i=1: 3

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+    y(i)=modulo(b,10)

+    b=b/10

+    b=floor(b)

+end

+d=x(1)+y(1)

+db=dec2bin(d)

+if d>9 then

+    db=dec2bin(d+6)

+    db=dec2bin(bin2dec(db)-bin2dec('10000'))

+end

+e=x(2)+y(2)

+eb=dec2bin(e)

+if d>9 then

+    eb=dec2bin(e+1)

+    e=e+1

+    end

+if e>9

+    eb=dec2bin(e+6)

+    eb=dec2bin(bin2dec(eb)-bin2dec('10000'))

+end

+f=x(3)+y(3) 

+fb=dec2bin(f)

+if e>9 then

+    fb=dec2bin(f+1)

+    f=f+1

+    end

+if f>9

+    fb=dec2bin(f+6)

+    fb=dec2bin(bin2dec(fb)-bin2dec('10000'))

+    dc(4)=1

+    end

+dc(1)=bin2dec(db)

+dc(2)=bin2dec(eb)

+dc(3)=bin2dec(fb)

+z=0

+for i=1: 4

+    z=z+dc(i)*(10^(i-1))

+end

+disp(z)

+disp('equivalent binary form')

+p=strcat(dec2bin(dc(4),1)+dec2bin(dc(3),4)+dec2bin(dc(2),4)+dec2bin(dc(1),4))

+disp(p)

+//answer is displayed//

diff --git a/1241/CH3/EX3.10/exa3_10.sce b/1241/CH3/EX3.10/exa3_10.sce
new file mode 100755
index 000000000..471e17db2
--- /dev/null
+++ b/1241/CH3/EX3.10/exa3_10.sce
@@ -0,0 +1,57 @@
+//Example 3-10//

+//Hamming code//

+clc

+//clears the command window//

+clear

+//clears all existing variables//

+z=0101

+//input//

+a=0;b=0;c=0;d=0;

+//taking the input//

+for i=1:7

+    x(i)=0

+    if i==3 then

+       x(i)=1

+    end

+    if i==6 then

+       x(i)=1

+    end

+end

+//establishing even parity at positions 1,3,5,7//

+for i=1: 7

+    if i==6 then

+       continue 

+    end

+    if x(i)==1 then

+       a=a+1

+    end

+end

+d=modulo(a,2)

+if (d==1) then

+    x(1)=1

+end

+//establishing even parity at positions 2,3,6,7//

+for i=2: 7

+    if x(i)==1 then

+        b=b+1

+    end

+end

+d=modulo(b,2)

+if (d==1) then

+    x(2)=1

+end

+//establishing even parity at positions 4,5,6,7//

+for i=5:7

+    if (x(i)==1) then

+        c=c+1

+    end

+end

+d=modulo(c,2)

+if (d==1) then

+    x(4)=1

+end

+//displaying the result//

+disp('the hamming code for this data is given as')

+for i=1:7

+    disp(x(i))

+end

diff --git a/1241/CH3/EX3.11/exa3_11.sce b/1241/CH3/EX3.11/exa3_11.sce
new file mode 100755
index 000000000..36b146df4
--- /dev/null
+++ b/1241/CH3/EX3.11/exa3_11.sce
@@ -0,0 +1,76 @@
+//Example 3-11//

+//Correction of received Hamming code//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+z=1111101

+//incorrect code taken as input//

+a=0;b=0;c=0;d=0;

+//taking the input in an array//

+for i=1: 7

+    x(i)=1

+    if i==2 then

+       x(i)=0 

+    end

+end

+//checking for 4,5,6,7 even parity//

+for i=4: 7

+    if x(i)==1 then

+       a=a+1 

+    end

+end    

+d=modulo(a,2)

+if d==1 then

+   disp('wrong entry for 4,5,6,7')

+   x(4)=1

+else

+    disp('correct entry for 4,5,6,7')

+end

+//checking for 2,3,6,7 even parity//

+for i=2: 7

+    if i==4 then

+       continue 

+    end

+    if i==5 then

+       continue 

+    end

+    if x(i)==1 then

+       a=a+1 

+    end

+end    

+d=modulo(a,2)

+if d==1 then

+   disp('wrong entry for 2,3,6,7')

+   x(2)=1

+else

+    disp('correct entry for 2,3,6,7')

+end

+//checking for 1,3,5,7 even parity//

+for i=1: 7

+    if i==2 then

+       continue 

+    end

+    if i==4 then

+       continue 

+    end

+    if i==6 then

+       continue 

+    end

+    if x(i)==1 then

+       a=a+1 

+    end

+end    

+d=modulo(a,2)

+if d==1 then

+   disp('correct entry for 1,3,5,7')

+   x(1)=1

+else

+    disp('wrong entry for 1,3,5,7')

+end

+disp('Therefore,bit 2 is in error and the corrected code is :')

+for i=1: 7

+    disp(x(i))

+end

+//correct code is displayed//    

+

diff --git a/1241/CH3/EX3.2/exa3_2.sce b/1241/CH3/EX3.2/exa3_2.sce
new file mode 100755
index 000000000..2df1386b0
--- /dev/null
+++ b/1241/CH3/EX3.2/exa3_2.sce
@@ -0,0 +1,66 @@
+//Example 3-2//

+//BCD addition//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=4318

+b=7678

+for i=1: 4

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+    y(i)=modulo(b,10)

+    b=b/10

+    b=floor(b)

+end

+d=x(1)+y(1)

+db=dec2bin(d)

+if d>9 then

+    db=dec2bin(d+6)

+    db=dec2bin(bin2dec(db)-bin2dec('10000'))

+end

+e=x(2)+y(2)

+eb=dec2bin(e)

+if d>9 then

+    eb=dec2bin(e+1)

+    e=e+1

+    end

+if e>9

+    eb=dec2bin(e+6)

+    eb=dec2bin(bin2dec(eb)-bin2dec('10000'))

+end

+f=x(3)+y(3)

+fb=dec2bin(f)

+if e>9 then

+    fb=dec2bin(f+1)

+    f=f+1

+    end

+if f>9

+    fb=dec2bin(f+6)

+    fb=dec2bin(bin2dec(fb)-bin2dec('10000'))

+end

+g=x(4)+y(4) 

+gb=dec2bin(g)

+if f>9 then

+    gb=dec2bin(g+1)

+    g=g+1

+    end

+if g>9

+    gb=dec2bin(g+6)

+    gb=dec2bin(bin2dec(gb)-bin2dec('10000'))

+    dc(5)=1

+end

+dc(1)=bin2dec(db)

+dc(2)=bin2dec(eb)

+dc(3)=bin2dec(fb)

+dc(4)=bin2dec(gb)

+z=0

+for i=1: 5

+    z=z+dc(i)*(10^(i-1))

+end

+disp(z)

+disp('equivalent binary form')

+p=strcat(dec2bin(dc(5),1)+dec2bin(dc(4),4)+dec2bin(dc(3),4)+dec2bin(dc(2),4)+dec2bin(dc(1),4))

+disp(p)

+//answer is displayed//

diff --git a/1241/CH3/EX3.3/exa3_3.sce b/1241/CH3/EX3.3/exa3_3.sce
new file mode 100755
index 000000000..9feb4c56c
--- /dev/null
+++ b/1241/CH3/EX3.3/exa3_3.sce
@@ -0,0 +1,40 @@
+//Example 3-3//

+//add 3 and 2 in Excess 3 code//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+n=3

+m=2

+z=0

+a=0110

+b=0101

+ea=dec2bin(n+3)

+eb=dec2bin(m+3)

+for i=1: 4

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+    y(i)=modulo(b,10)

+    b=b/10

+    b=floor(b)

+end

+for i=1: 4

+    g(i)=bitand(x(i),y(i))

+    p(i)=bitor(x(i),y(i))

+end

+c(1)=0

+for i=1: 4

+    c(i+1)=bitor(g(i),bitand(p(i),c(i))) 

+end

+if c(5)==1 then

+         z=dec2bin(bin2dec(ea)+bin2dec(eb)+3)  

+end

+if c(5)==0 then

+          z=dec2bin(bin2dec(ea)+bin2dec(eb)-3)

+end

+disp('equivalent binary number after excess 3 addition' )

+disp(z)

+disp('equivalent decimal number')

+disp(m+n)

+//result is displayed//

diff --git a/1241/CH3/EX3.4/exa3_4.sce b/1241/CH3/EX3.4/exa3_4.sce
new file mode 100755
index 000000000..a096d18b4
--- /dev/null
+++ b/1241/CH3/EX3.4/exa3_4.sce
@@ -0,0 +1,40 @@
+//Example 3-4//

+//add 6 and 8 in Excess 3 code//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+n=6

+m=8

+a=1001

+b=1011

+ea=dec2bin(n+3)

+eb=dec2bin(m+3)

+for i=1: 4

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+    y(i)=modulo(b,10)

+    b=b/10

+    b=floor(b)

+end

+for i=1: 4

+    g(i)=bitand(x(i),y(i))

+    p(i)=bitor(x(i),y(i))

+end

+c(1)=0

+for i=1: 4

+    c(i+1)=bitor(g(i),bitand(p(i),c(i))) 

+end

+if c(5)==1 then

+       z=dec2bin(bin2dec(ea)+bin2dec(eb)+3)  

+end

+if c(5)==0 then

+       z=dec2bin(bin2dec(ea)+bin2dec(eb)-3)

+end

+disp('equivalent binary number after excess 3 addition' )

+disp(z)

+disp('equivalent decimal number') 

+disp(m+n)

+//result is displayed//

+ 

diff --git a/1241/CH3/EX3.5/exa3_5.sce b/1241/CH3/EX3.5/exa3_5.sce
new file mode 100755
index 000000000..072664120
--- /dev/null
+++ b/1241/CH3/EX3.5/exa3_5.sce
@@ -0,0 +1,30 @@
+//Example 3-5//

+//binary to gray code//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=1011

+for i=1: 4

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+end

+y(4)=x(4)

+k=3

+while(k>0)

+    if bitand(x(k+1),x(k))==1 then

+        y(k)=bitcmp(1,1)

+    else

+        y(k)=bitor(x(k+1),x(k))

+    end    

+    k=k-1

+end           

+//display//

+z=0

+for i=1: 4

+    z=z+y(i)*(10^(i-1))

+end

+disp('equivalent gray code')

+disp(z)

+//equivalent gray code is displayed//

diff --git a/1241/CH3/EX3.6/exa3_6.sce b/1241/CH3/EX3.6/exa3_6.sce
new file mode 100755
index 000000000..71d0da64b
--- /dev/null
+++ b/1241/CH3/EX3.6/exa3_6.sce
@@ -0,0 +1,30 @@
+//Example 3-6//

+//binary to gray code//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=1001011

+for i=1: 7

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+end

+y(7)=x(7)

+k=6

+while(k>0)

+    if bitand(x(k+1),x(k))==1 then

+        y(k)=bitcmp(1,1)

+    else

+        y(k)=bitor(x(k+1),x(k))

+    end    

+    k=k-1

+end           

+//display//

+z=0

+for i=1: 7

+    z=z+y(i)*(10^(i-1))

+end

+disp('equivalent gray code')

+disp(z)

+//equivalent gray code is displayed//

diff --git a/1241/CH3/EX3.7/exa3_7.sce b/1241/CH3/EX3.7/exa3_7.sce
new file mode 100755
index 000000000..046fd2923
--- /dev/null
+++ b/1241/CH3/EX3.7/exa3_7.sce
@@ -0,0 +1,29 @@
+//Example 3-7//

+//gray code to binary//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=1011

+for i=1: 4

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+end

+y(4)=x(4)

+k=3

+while(k>0)

+    if bitand(y(k+1),x(k))==1 then

+        y(k)=bitcmp(1,1)

+    else

+        y(k)=bitor(y(k+1),x(k))

+    end    

+    k=k-1

+end

+z=0

+for i=1: 4

+    z=z+y(i)*(10^(i-1))

+end

+disp('equivalent binary code')

+disp(z)

+//equivalent binary code is displayed//

diff --git a/1241/CH3/EX3.8/exa3_8.sce b/1241/CH3/EX3.8/exa3_8.sce
new file mode 100755
index 000000000..bb96bd423
--- /dev/null
+++ b/1241/CH3/EX3.8/exa3_8.sce
@@ -0,0 +1,29 @@
+//Example 3-8//

+//gray code to binary//

+clc

+//clears the console//

+clear

+//clears all existing variables//

+a=1001011

+for i=1: 7

+    x(i)=modulo(a,10)

+    a=a/10

+    a=floor(a)

+end

+y(7)=x(7)

+k=6

+while(k>0)

+    if bitand(y(k+1),x(k))==1 then

+        y(k)=bitcmp(1,1)

+    else

+        y(k)=bitor(y(k+1),x(k))

+    end    

+    k=k-1

+end

+z=0

+for i=1: 7

+    z=z+y(i)*(10^(i-1))

+end

+disp('equivalent binary code:')

+disp(z)

+//equivalent binary code is displayed//

diff --git a/1241/CH3/EX3.9/exa3_9.sce b/1241/CH3/EX3.9/exa3_9.sce
new file mode 100755
index 000000000..d852255cd
--- /dev/null
+++ b/1241/CH3/EX3.9/exa3_9.sce
@@ -0,0 +1,60 @@
+//Example 3-9//

+//Hamming code//

+clc

+//clears the command window//

+clear

+//clears all existing variables//

+z=1011

+//input//

+a=0;b=0;c=0;d=0;

+//taking the input//

+for i=1:7

+    x(i)=0

+    if i==3 then

+       x(i)=1

+    end

+    if i==5 then

+       x(i)=1

+    end

+    if i==7 then

+       x(i)=1

+    end

+end

+//establishing even parity at positions 1,3,5,7//

+for i=1: 7

+    if x(i)==1 then

+       a=a+1

+    end

+end

+d=modulo(a,2)

+if (d==1) then

+    x(1)=1

+end

+//establishing even parity at positions 2,3,6,7//

+for i=2: 7

+    if (i==5) then

+        continue

+    end

+    if (x(i)==1) then

+        b=b+1

+    end

+end

+d=modulo(b,2)

+if (d==1) then

+    x(2)=1

+end

+//establishing even parity at positions 4,5,6,7//

+for i=5:7

+    if (x(i)==1) then

+        c=c+1

+    end

+end

+d=modulo(c,2)

+if (d==1) then

+    x(4)=1

+end

+//displaying the result//

+disp('the hamming code for this data is given as')

+for i=1:7

+    disp(x(i))

+end