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TWEET # Lul a guest Dec 16th, 2018 68 Never
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1. #include <iostream>
2. #include <math.h>
3. #include <cmath>
4.
5. using namespace std;
6.
7. double sum(int k, double x);
8.
9. int main()
10. {
11.     int k = 1;
12.     for(double i = -0.5 ; i <-0.1 ; i+=0.1){
13.         k = 1;
14.         while(abs(sum(k, i)-sum(k+1, i))<0.001)
15.             k++;
16.         cout<<i<<" "<<k<<" "<<sum(k, i)<<endl;
17.     }
18.     for(double i = 0.1 ; i <=0.5 ; i+=0.1){
19.         k = 1;
20.         while(abs(sum(k, i)-sum(k+1, i))<0.001)
21.             k++;
22.         cout<<i<<" "<<k<<" "<<sum(k, i)<<endl;
23.     }
24.
25.     return 0;
26. }
27.
28.
29. double sum(int k, double x){
30.     double totalSum = 0;
31.     double a, b;
32.     for(double i = 1 ; i<=k ; i++){
33.         a = pow(-1, i+1)/i;
34.         b = (pow(-1, i)*6)/(pow(i,3)*pow(M_PI,2));
35.         totalSum += (a+b)*sin(i*M_PI*x);
36.     }