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clear
//
//
//
//Variable declaration
lamda=3*10**-10 //wavelength(m)
h=1
k=0
l=0 //miller indices
theta=40*%pi/180 //glancing angle(radian)
n=1 //order
//Calculation
d=n*lamda/(2*sin(theta)) //space of reflecting plane(m)
a=d*sqrt(h**2+k**2+l**2)
V=a**3 //volume of unit cell(m**3)
//Result
printf("\n space of reflecting plane is %0.4f angstrom",d*10**10)
printf("\n volume of unit cell is %0.2f *10**-29 m**3",V*10**29)
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