public class Square int count double x1 x2 x3 error err foo static Dou

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
public class Square {
int k, count;
double x1, x2, x3, error, err, foo;
static Double[] Val = new Double[5];
public Square(int k, double x1, double x2, double x3, double error){
this.k = k;
this.x1 = x1;
this.x2 = x2;
this.x3 = x3;
this.error = error;
}
private double fun(int k, double x){
switch (k)
{
case 1: foo = Math.sin(x); break;
case 2: foo = x*x + 4; break;
default: foo = Math.exp(x);
}
return Math.abs(foo);
}
public Double[] Method() {
count = 0;
Val[4] = 0.0;
do {
count ++;
for (int i = 0; i < 4; i++) {
Val[i] = 0.0;
}
for (double i = x1; i < x2; i += Input.x3) {
Val[0] += ((i + error) - i) * fun(k, i);
Val[1] += ((i + error) - i) * fun(k, ((i + error) + i) / 2);
Val[2] += ((i + error) - i) * fun(k, (i + error));
Val[3]++;
}
Input.x3 *= 2;
err = 1/3*Math.abs(Val[1] - err);
} while((err > error) && (count <= 1));
Val[4] = err;
return Val;
}
}