View Code of Problem 48

#include <stdio.h>
void main(){
	int n,t;
	double i=1,j=2,s=0;
	scanf("%d",&n);
	while(n>0){
		s+=(j/i);
		t=j;
		j=i+j;
		i=t;
		n--;
	}
	printf("%.6f",s);

}

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