Improve the C program design to make it run successfully. Urgent!!!

The operating system environment is OK in both Windows and DOS.

The compilation environment of C language should be Turbo C, which is the authentic and commonly used C language compiler. If you feel uncomfortable using it, you can type ** into the notepad and save it as an extension. c and then open it with turbo c.

Compile with VC, it's not very fast......

Not clear about your question

The result is 9 11 9 10

i is to add 1 to the value of i first, and then use the changed value of i.

j++ is to use the original value of j 10 first, and then change the value of j to add 1

Output: 9, 11, 9, 10

It is recommended that you take a closer look at the difference between ++i and i++.

case 1:casea();break;

case 2:caseb();break;

case 3:casec();break;

case 4:cased();break;

Here, you don't have these four functions, so the program can't be changed, where are you copying?

You're supposed to be in college, right?

It's important to have a good book on C and read it at least 3-5 times to make sure that you have a different understanding of the same concept and function every time.

And then there are the classic algorithm ideas, which are not much to be familiar with3The data is structured.

4.It depends on whether you choose pure C or C++ programming.

Important Idea Divide and conquer If your program is complex, break it down into simple subfunctions.

Do not nest more than 3 for in a subfunction.

Ordinary people can't think about complex problems well, and breaking down complex problems into multiple relatively simple problems can simplify thinking.

Let's do more exercises first, and then do the rest when you know all the exercises.

There is an error in the program, send it to my mailbox, and I will help you troubleshoot.

Memory overflow, ** issue.