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+//Example 17.14//
+
+b=1.008;//g //atomic mass of Hydrogen
+c=28.09;//g //atomic mass of Silicon
+a=100;//given
+e=0.2;//given
+f=0.8;//given
+a2=f*c //(cross multiplying)
+//mprintf("a2 = %f ",a2)
+a3=b*a //(cross multiplication)
+//mprintf("a3 = %f ",a3)
+a4=e*b //(cross multiplication)
+//mprintf("a4 = %f g Si",a4)
+a5=e*a3//multiplication
+//mprintf("a5 = %f g Si",a5)
+x=a5/(a2-a4)
+mprintf("x = %f g H",x)
+x1=0.889;//g H
+x2=a-x1
+mprintf("\nx2 = %f g Si",x2)
+a7=2.3; //g cm^-3 //density of pure amporhous silicon
+//the volume occupied by the silicon will be
+V=x2/a7
+mprintf("\nV = %f cm^3",V)
+//Therefore the density of the alloy will be
+p=a/V
+mprintf("\np = %f g cm^-3",p)
+//which is an increase of
+a1=((p-a7)/(a7))*100
+mprintf("\na1 = %f percent ",a1)