题解 | #求小球落地5次后所经历的路程和第5次反弹的高度#

#include <stdio.h>

int main() {
    int a, i = 0;
    int sum = 0, fl = 0;
    scanf("%d", &a);
    a *= 1000000;
    fl = a;
    while (i < 5) {
        sum += fl * 2;
        fl = fl / 2;
        //printf("%d %d\n",sum,fl);
        i++;
    }
    sum -= a;//sum=每次最高点高度×2-初始高度
    //printf("%.6f %.6f\n",(double)sum/1.0/1000000,(double)fl/1.0/1000000);
    printf("%g\n%g\n", (double)sum / 1.0 / 1000000,
           (double)fl / 1.0 / 1000000); //输出时小数尾部没有多余的0
    return 0;
}