The graduation project urgently needs the VB examination system a 10

I did it with asp+vb+access, it's been tested and it works.

Supported question type: single choice. Multiple choices. Judgment. Fill a vacancy. Short answer.

Basic features: Questions can be added at any time.

You can randomly select questions (specify the question type and number of questions, for multiple semesters, you can set the proportion of questions in each semester) to automatically randomly scramble the selected test questions, and generate test papers and distribute them to each student (the order of test questions is different for each student, which can prevent cheating to a certain extent).

For multiple-choice questions, the order of options appears randomly.

You can set the start time and end time of the exam (and automatically do not log in 30 minutes after the start of the test) During the test, you can draw papers for cheating students at any time.

During the exam, all data is saved on the server, and the failure of the candidate's machine does not affect the continuation of the exam.

After the test is completed, you can use the marking system to mark the paper semi-automatically (you can complete a test paper within 2 minutes if you are proficient).

The exam can be divided into two types: formal exam and mock exam, for the formal exam, you must log in with the student number + password (limit a single person to a single machine, multiple people are not allowed to log in to one machine, and one person is not allowed to log in to multiple machines, with the exception of failure, the invigilator can confirm that the machine can be replaced).

Passwords are randomly generated, and can be made in advance and distributed to the corresponding candidates at the time of the exam.

If needed: Plus (first stated, not free).

VB supermarket purchase, sale and inventory management system VB + access source ** + executable file + ** + proposal + foreign language translation + defense ppt

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I changed these two sentences to comment statements (because the values of a,b are given later.). I don't know what your teacher wants to do = =), and the minus sign of the next two formulas is standardized (because it is wrong). And then you get the result like the second picture.

The most taboo thing to write a program is to use meaningless letters as variables, which will make the program readable poorly.

When using the iterative algorithm, you should pay attention to whether the iteration converges, and you can print whether the value of the exit condition meets the expectation inside the loop body.

I don't understand. t_t

1. To write a complete program, you first need to design the entire program program, including the purpose of program design, the function that program design needs to achieve, the framework of program design, the process of program design, etc., and then design the program interface, which must be beautiful and humane, and then a large number of writing generation code to realize the function of the program, you need to pay attention to the complete realization of the program function, enhance the robustness of the program, reduce bugs, and the program should be efficient and the results accurate.

2. I wrote a set of student management system in school, first designed the entire system scheme, the interface design of the student registration management system, the menu, toolbar, the main interface, the sub-interface and other interface control design, functional design, to realize the student status information query, student course and grade query, student class related query, student database system update, etc., program design framework, first do the entire database, and then write the input method of student database data, batch import or single import, the latter manual input, Then do the database query, update, add, delete and other functions, use the VB program to realize, and finally write a flowchart to facilitate your own program design.

3. In the process of writing the interface design and the program, the focus is on the writing of the program, especially the function implementation, can not be wrong, can not have a big bug, and be sure to enhance the robustness of the program, reduce the time for future debugging, it is difficult to know that the missing point is the program debugging, because there will be a lot of unexpected bugs after the program is made, so let different people try it to minimize the program bugs, and then be tested in practice!

I don't know the rest of it.

The formation of the software crisis.

1.Hardware productivity has increased dramatically.

2.Software production increases in complexity as the scale increases.

3.Software productivity is low.

4.There is an imbalance between hardware and software supply and demand.

5.Contradictions are triggered"Software crisis"

The embodiment of the software crisis.

1.Software development progress is difficult.

2.The cost of software development is difficult to control.

3.It is difficult for users to meet the product features.

4.The quality of software products cannot be guaranteed.

5.Software products are difficult to maintain.

It has been said: The software productivity is very low, the quality cannot be guaranteed, and the cost is difficult to control, but the problem in A (the software process is not standardized) is not mentioned, so A is chosen