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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5.  
  6. int main() {
  7. double x, a, e, b=1, z=1;
  8. int n=0;
  9. cin >> x;
  10. cin >> e;
  11. a = (exp(x) + exp(-x)) / 2;
  12. do
  13. {   
  14. 	z*=(x*x)/((2*n + 1)*(2*n + 2));
  15. 	b+=z;
  16. 	n++;
  17. }
  18. while(fabs(a-b) > e);
  19. cout << a << endl;
  20. cout << b << endl;
  21. cout << n << endl;
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 3476KB
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stdin
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3
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stdout
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10.0677
10.0502
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https://ideone.com/vTqCr1
Ю3.36
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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