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What does thita mean in mathematics?
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# including "iostream"

Use namespace std

# contains "cmath"

void main()

{

int i=0,j = 0;

double thita[8]={ 1.5708,0.7854,0,-0.7854,- 1.5708,-2.3562,-3. 14 16,-3.927},

S=0.4 142,

a,B,E,

I[8][8],ln[8],aatan[8];

for(I = 0; I < = 7; i++)

{

for(j = 0; j & lt=7; j++)

{

If (i==j)

I[I][j]= 3. 14 16;

other

{

a = 0-(x[I]-a[j])* cos(thita[j])-(y[I]-b[j])* sin(thita[j]);

b =(x[I]-a[j])*(x[I]-a[j])+(y[I]-b[j])*(y[I]-b[j]);

e =(x[I]-a[j])* sin(thita[j])-(y[I]-b[j])* cos(thita[j]);

ln[j]= log( 1+(S * S+2 * A * S)/B);

aatan[j]= atan((S+A)/E)-atan(A/E);

I[I][j]= 0.5 * sin(thita[I]-thita[j])* ln[j]-cos(thita[I]-thita[j])* aatan[j];

}

Extended data:

Most input/output (I/O) operations under Win32 have two forms: synchronous or asynchronous. It has been proved that in many cases, multi-thread design using synchronous I/O can be simulated by using asynchronous single-thread I/O. This paper does not discuss asynchronous single-threaded I/O as an alternative to multithreading, but suggests that both designs should be considered at the same time.

Note that the design of Win32 I/O system provides some mechanisms to make asynchronous I/O better than synchronous I/O (for example, I/O completion port). I plan to discuss synchronous I/O and asynchronous I/O in future articles.

Baidu Encyclopedia -Win32 Multithreading