习题三答案 3.1: 1-5: CBCAA 6-10: BDACC 11-13: DAD 1.262.563.2,284.02305.1,3,26. double int n 1/习题三答案 3.1: 1-5:CBCAA 6-10:BDACC 11-13:DAD 3.2 1. 26 2. 5 6 3. 2,28 4. 0230 5. 1,3,2 6. double int n 1/i