View Code of Problem 48

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include<math.h>
void main() {
    int n;
    double sum=0, m = 1, j = 2, k;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        sum += j / m;
        k = j+m;
        m = j;
        j = k;
    }
    printf("%.6f\n", sum);
}