从键盘上输入一个数据，判断其奇偶性，若是偶数，将其分解为2个素数之和，若是奇数，判断其是否为素数，若是素数，找出其孪生素数（例如：5的孪生素数为3和7,11的孪生素数为13）-A data input　the keyboard, determine the parity For even, be decomposed into the sum of two primes　odd, to determine whether is a prime number, if the prime numbers, find its twin primes (eg: 5 twin primes 3 and 7, 11 and 13 twin primes)