Invite the VB master to come in. 30, please come in with VB masters.

Heapfree is only responsible for parameter verification. The real action happens in iheapfree and x heapfree, and in addition to freeing up the specified heap memory, the function also checks if it is necessary to merge free blocks.

Can be used to optimize memory.

In addition, the programming uses the HEAP series, which can replace Malloc and Free, saving system overhead, that is, optimizing the program.

Go to the forum of the computer newspaper and ask someone about it.

There are a lot of people who like to code there, and there are many masters.

loopwhile

tf The second cycle is performed when tf is true, so regardless of whether the condition is true or false, the first cycle is executed unconditionally, so it is correct.

loopuntil

Tfuntil means that the condition is met before tf is true (i.e., false), i.e. as long as the condition is false, the cycle will continue forever, so it is correct.

3.I'll give you the details, and you can judge for yourself. "A do loop can only use one loop keyword" is correct, and then, it is true that multiple exit statements can be written in a do-loop loop**, but the actual use (i.e., effectively executed) is only one sentence, thinking that after the exit statement is executed, the whole process is skipped (the smallest is exit

do）。So judge for yourself this sentence, the answer is all floating clouds.

4.Arithmetic expressions are mathematical expressions, which can be programmed using mathematical symbols, assigned variables, functions with return values, and so on. Arithmetic expressions follow mathematically symbolic priority operations.

For example, 1+1 is an arithmetic expression.

x=51+x is also an arithmetic expression.

function

addnum(innum

asinteger)

asinteger

addnum

innumendfunction

addnum+3-5*10 is still an arithmetic expression.

I've said so much, you just need me one question:

What department are you a student in? Software Engineering? What grade?

If x is a positive real number, the expression for rounding the 3rd decimal place of x is b *int(100 * x +

x + if the 3rd decimal place = 5, it will be rounded to the 2nd place; Otherwise, carry will not occur.

100 * x + Shift the decimal point to the right by 2 places (i.e. the 3rd decimal place after the original decimal point is "rounded").

int(100 * x + discard all digits from the third decimal place to the right.

int(100 * x + moves the original decimal point back to the left by 2 places.

The meaning of the title is that x is a floating-point variable, and if x is directly output to be a number with a very long decimal place, we need to round x to three decimal places so that it has only three decimal places.

a=30 I'll write it in.

First, perform the first loop of i.

i1:j is going to loop 1 to 3 here

That's 3 times.

Of these three times, k is performed three more times at a time.

Each time k is executed

A adds i i=1 so add 1

k 9 times.

a=a+9*i=0+9=9

So first cycle = 9

Then there's i2:

j is going to loop 2 to 3 here

That is, 2 times.

Of these two times, k is executed 3 times at a time.

Each time k is executed

A adds i i=2 so add 2

k 6 times.

a=a+6i=9+6*2=21

i3:j loops once.

k 3 times per cycle.

A total of 3 times, each time a=i+a

a=a+3i=21+3*3=30

Here, for k=1 to 3 must be executed 3 times, so when you cancel it, it becomes a=a+3*i

for j=i to 3, the number of executions is (4-i) times (i=1 3).

So, the whole program can be reduced to a single loop:

for i=1 to 3

a=a+3*i*(4-i)

next i

That is, a=3*(1*3+2*2+3*1)=3*10=30

a=3:b=5:c=9

a=a+b 'a=8

b=a-b 'b=3

if a-b>c-a then c=a+b 'c=11if a+b>c-b then a=c+b 'c=11 This is the key. a+b=11>c-b=8, a=11+3

Final result: a=14, b=3, c=11

In the future, I will enter the question, and I will have to write it by hand if you use **.