View Code of Problem 71

#include<stdio.h>
#include<string.h>
int main(){
	char a[100],c;
	int i,len=0,j=1,s[100],f1,f2,s1,s2,m1,m2,x,y;
	double aa=0,k,zi=1,mu=2;
	scanf("%d",&x);
	for(i=0;i<x;i++){
		aa+=mu/zi;
		k=mu;
		mu=mu+zi;
		zi=k;
	}
	printf("%.2lf\n",aa);
	return 0;
}