View Code of Problem 71

#include<stdio.h>
int main()
{
    float a=1.00,b=2.00,sum=0.00,t;
    int i;
    int n;
    scanf("%d",&n);
    for(i=0;i<n;i++){
        sum=b/a+sum;
        t=a;
        a=b;
        b=t+b;
    }
    printf("%.2f",sum);
}