编辑代码

#include <stdio.h>
int main () {
    //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。 
    int n, i;
    int dividend, divisor;
    double sum = 0.0;
    double t = 0.0;
    scanf("%d", &n);
    dividend = 2;
    divisor = 1;
    for( i=1; i<=n; i++ ){
        sum += dividend/divisor;
        t = dividend;
        dividend = dividend + divisor;
        divisor = t;
    }
    printf("%d %d\n", dividend, divisor);
    printf("%.2f\n", sum);
    return 0;
}