VC homework after class, I still can t get a satisfactory result after thinking about it for a long

1.It should be a[i][j]=rand(); rand() produces a random number at a time, and the above a[ is all value m.

2.Strings have a closing flag "0", which can be used to get the length, and an example is written as follows:

Use intermediate variable swapping to achieve reverse order, note that the pstr cannot be a constant space, and the constant string is in a static store.

e.g. char *ch ="test";Not right, and char ch ="test";That's it.

void reversestring(char *pstr)

int i = 0;

int len = 0;

char chtemp = '\0';

Get string length *

while('\0' != (*pstr)){

len++;

pstr++;

Use intermediate variable swapping to achieve reverse order *

while(0 < len--)pstr--;Move to head

for(i = 0; i < len / 2; i++)

chtemp = pstr[i];

pstr[i] = pstr[len - 1 - i];

pstr[len - 1 - i] = chtemp;

pstr[len] = '\0';

#include

#include

void main ()

int a[4][5];

m=rand();

for (int i=0;i<4;i++)for (int j=0;j<5;j++)a[i][j]=rand();

cout compiled it and you're good to go!

I think there are some places where Delphi can do VC that can't be done, or it's not better than Delphi. You can choose whichever you want, just be proficient.

If it comes to full control over the Windows system, VC is better than Delphi, and if you want to program GUI programs or if you want to write Linux system applications, then Delphi is the absolute winner.

Ctrl+F7: compilation.

f7: Formation.

Ctrl+F5: Run.

f9: Insert to remove a breakpoint.

f5: Start debugging.

shift+f5: stops debugging.

In addition, the top floor!

It's hard to explain this. It's best to find a friend and train in person for a few hours.

By the way, if you have a meal with your friends, it will be much easier.

Does it matter what you have learned?

It's just a library.

Don't you know how to use a stl library in C++?

MFC is not all the same, and access to the database is efficient, convenient, and does not like to learn, even if it is ** for you, you will not either.

Those who love to learn can talk about it and find it themselves.

Do you think you learned everything by yourself after work?

And let me tell you, you're absolutely unemployed, you're not able to learn on your own, and no amount of study you try, it's useless.

To give you an example, it might help to research it yourself!

It's wrong, it's right, and the results you get may not be what you want.

1 m is divisible, which means that the result must be an integer. 1 is the same as m, and no type escalation will occur.

m gets a double that involves a type boosting problem. It is a single-precision floating-point type, which is automatically promoted to a double-precision floating-point operation, and m, in order to maintain consistency, is also automatically promoted to a double-precision floating-point type, and the type boost will only be promoted to the type with more bytes. float is automatically promoted to double

No, it's a floating-point number, and 1 is an integer. The value of 1 2 in the operation is 0

It has something to do with sound waves! Converts sound energy into electrical energy. The reason for the increasing popularity is that the technology is mature and the cost is reduced.

P.S. There are many names for hearing aids, but all electronic hearing aids work the same. Any hearing aid consists of 6 basic structures.

1 Microphone (microphone or microphone) takes sound and converts it into radio waves, i.e., converts sound energy into electrical energy.

2 Amplifier amplifies electrical signals (transistor amplification circuits).

3 Headphones (receivers) convert electrical signals into acoustic signals (i.e., convert electrical energy into sound energy).

4 Earmolds (earbuds) are placed in the external ear canal.

5 Volume control switch.

6 Power supply Dry cell batteries for amplifiers.

In addition to the above 6 parts, most hearing aid models have 3 accessories, or 3 additional circuits (tone control, induction coil, output limit control). Modern electronic hearing aids are amplifiers whose function is to increase the intensity of sound energy and transmit it to the ear as undistorted as possible. Since the sound cannot be directly amplified by sound, it is necessary to convert it into an electrical signal, which is amplified and then converted into sound energy.

The input transducer consists of a microphone (microphone or microphone), a magnetic coil, and other parts. Its function is to convert the input sound energy into electrical energy and transfer it to the amplifier. The amplifier amplifies the input electrical signal and transmits it to the output transducer.

The output transducer is composed of a headset or a bone conduction vibrator, which is used to convert the amplified signal from electrical energy to sound energy or kinetic energy output. The power supply is an indispensable part of the working energy of the hearing aid, and there is also a peak shaving (PC) or automatic gain control (AGC) device to meet the needs of patients with different degrees of deafness.

I thought that physics in high school was difficult, but after reading this question, ah, admire, admire, where are you? It's so pitiful, I did this kind of question in junior high school.

It's weird to do physics now.

Hold it. Hold it. Hold it. Hold it. Hold it.

I just need it too, hehe, it's good, it's convenient for others

Neither will I.

This is a question!!

I'm writing my homework!

Oh my God, you're in your third year of junior high school!!

I went online this time because of this question!!

Look at his construction, and then think about what principles in physics are similar to this, and you can explain it.

You guys are amazing, I think I've been thinking about this question for a long time, thank you for the answer.

Wow, you're so good, I'm all because of this question.

Go up to the place where you bought this thing and ask.