2.

1. 212

(function: converting character data into plastic data);

2. num = 311, score = 93

(function: find the highest score and corresponding number);

3.13579

(function: finding out odd numbers in input data);

4. yes

no

(function: judge whether the input number is a prime number);

5.1

(running in VC 6. results in different compilers);

6.124

(function: find the n power of 2);

7.63

85

(function: take some characters of a string to form plastic data);

8.（11）：d=1.

(12）：k++

(13）：k< =n

9. (14）：i< = y

(15): z * x

1. xabcdbcd

11.124

(function: same as question 6);

3.

1. I++

2. J <; =i

3. a[i][j]

Note: There are many errors in the code in the title, and the above answers are all considered on the basis of "meaningful code".