initial commit / add all books

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diff --git a/1332/CH19/EX19.5/19_5.sce b/1332/CH19/EX19.5/19_5.sce
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+//Example 19.5

+//Lax Wendroff Method

+//Page no. 660

+clc;clear;close;

+

+c=-2;dt=0.07;dx=0.2;

+r=abs(c)*dt/dx;

+printf('\n  x\ti\t|\tj -->\t')

+for i=0:6

+    printf('  %i\t',i)

+end

+printf('\n  |\t|\t|\tt -->\t')

+for i=0:6

+    printf('%.3f\t',i*dt)

+end

+i=1;

+printf('\n---------------------------------------------------------------------------------------')

+for j=1:7

+    for i=1:6

+        if j==1 then

+            u(i,j)=0;

+            u(i+1,j)=0;

+        elseif i==1 then

+            u(i,j)=1

+        else

+            u(i,j)=r*(r-1)*u(i+1,j-1)/2+(1-r^2)*u(i,j-1)+r*(1+r)*u(i-1,j-1)/2

+        end

+    end

+end

+for i=1:6

+    printf('\n %.1f\t%i\t|\t\t',(i-1)*dx,i-1)

+    for j=1:7

+        printf('%.3f\t',u(i,j))

+    end

+end
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