为什么要取值为1.0呢？

Arqiu @ 2019-02-07 16:37:03

int N, K;
double Sn;
cin >> K;
while(Sn <= K){
    N++; 
    Sn += 1.0/N;    //一定要1.0 
}
cout << N;

return 0;

by Celestial_Scarlet @ 2019-02-07 16:40:21

@Arqiu N和1类型都是int，所以1/N会按整除处理

by Arqiu @ 2019-02-07 16:53:05

@baoyu 懂了！感谢大佬一语道破╭(′▽`)╯