View Code of Problem 48

#include<stdio.h>
int main()
{
	int n, a, b;
	double k, s ,i, j;
	s = 0; 
	i = 1;
	j = 2;
	scanf("%d", &n);
	for (a = 0; a < n; a++)
	{
		k = j / i;
		s = s + k;
		b = j;
		j = i + j;
		i = b;
	}
	printf("%.6lf", s);
	return 0;
}

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