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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	long long int input, fact = 1, i ;
  5. 	float e = 1.0f ;
  6. 	scanf("%lld", &input);
  7. 	for(i = 1; i < input; ++i)
  8. 	{
  9.     	fact *= i ;
  10.     	e += (1.0f/(float)fact);
  11. 	}
  12. 	printf("%f", e);
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0s 2056KB
comments (?)
stdin 
10
stdout 
2.718282
https://ideone.com/Puafh7
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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