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  1. #include <stdio.h>
  2.  
  3.     #define F float
  4.     #define c(x,n) 1+g(1,n,x,1,1,1)
  5.     F g(F i,F n,F x,F s,F p,F f){s=-s;p*=x*x;f*=i;return i<n?g(i+1,n,x,s,p,f)+s/2*p/f:0;}
  6.  
  7. int main(void)
  8. {
  9. 	printf("%f", c(0.5,2));
  10. 	return 0;
  11. }
  12.  
Success #stdin #stdout 0s 9432KB
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Standard input is empty
stdout
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0.875000
https://ideone.com/lxXauH
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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