View Code of Problem 48

#include<stdio.h>
main()
{
	int a[10],b[10],i,n;
	double c[10],sum=0;;
	a[0]=2;
	b[0]=1;
	for(i=1;i<10;i++)
	{
		a[i]=a[i-1]+b[i-1];
		b[i]=a[i-1];
	}
	for(i=0;i<10;i++)
		c[i]=1.0*a[i]/b[i];
	scanf("%d",&n);
	for(i=0;i<n;i++)
		sum+=c[i];
	printf("%.6f\n",sum);
	return 0;
}

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