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  1. #include <iostream>
  2. #include <cmath> 
  3. using namespace std;
  4. double cos (double x, double e) {
  5. 	double x2,c,n,f,z;
  6.     x2= x*x;
  7. 	f= 2;
  8. 	c= 1;
  9. 	n= 2;
  10. 	z= -1; 
  11.     while ((x2/f)>=e) {
  12. 	 	c=c+z*x2/f;
  13. 		n=n+2;
  14. 		x2=x2*x*x;
  15. 		f=f*(n-1)*n;
  16. 		z=z*(-1);
  17.      }
  18.      return c;
  19. }
  20. int main() {
  21. 	double x,e;
  22. 	cin>>x;
  23. 	cin>>e;
  24.  
  25.  
  26. 	cout<<cos(x,e)<<endl;
  27. 	return 0;
  28. }
Success #stdin #stdout 0s 3464KB
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https://ideone.com/7K5XDK
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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