View Code of Problem 71

#include <stdio.h>
int main()
{
	float fenzi = 1,fenmu = 1,temp;
	int i,n;
	float sum=0,fenshu;
	scanf("%d",&n);
	for(i=1;i<=n;++i)
	{
		temp  = fenzi;
		fenzi = fenzi + fenmu;
		fenmu = temp;
		fenshu = fenzi/fenmu;
		sum = sum + fenshu;		
	}
	printf("%.2f",sum);
	return 0;
}

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