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Program to find the sum of the cube of the digits of a three digit number

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C      Program to find the sum of the cube of the digits of a
C      three digit number
        write(*,*)'Enter a three digit number:'
        read(*,*)n
        m=n
        r=mod(n,10)
        n=n/10
        i=mod(n,10)
        n=n/10
        write(*,*)'The digits of the number',m,'is',n,',',i,',',r
        k=n**3+i**3+r**3
        write(*,*)'The sum of the cube of these digits is',k
        end
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