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implicit double precision(a-h,o-z)

write(*,*) "please provide the a,b,c coeff"

read(*,*) A,B,C

D=B*B-4*A*C

if(D.GT.0) then

root1=(-B/(2*A))+(SQRT(D))/(2*A)

root2=(-B/(2*A))-(SQRT(D))/(2*A)

write(*,*) root1,root2

elseif(D.EQ.0) then

root1=(-B/(2*A))

root2=root1

write(*,*) root1,root2

else

root1=(-B/(2*A))+(SQRT(-D))/(2*A)

root2=(-B/(2*A))-(SQRT(-D))/(2*A)

a=(root1+root2)/2

b=(root1-root2)/2

write(*,*) 'realpartroot=',a, 'complexpartroot=',b

endif

stop

END

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