1、C = I Mod 100 Mod 102、周长:2*p*r 面积:s=p*r^2
c = right(I,1)周长 = p * r * 2面积: s = p * r * r
(1)C=I mod 10 mod 10(2)C(周长)=2*p*r;s(面积)=p*r*r