单选题库

int N,Flag;
cin >> N;
Flag = true;
while (N != 0){
    if (N %2 != 0){
        Flag = false;
        _____________
    }
    else
        N /= 10;
}
if(Flag == true)
    cout << "是";
else
    cout << "否";

int n, masks, days,cur;
n = 17, masks = 10, days = 0;
cur = 2;
while (masks != n){
    if (cur == 0 || cur == 1)
        masks += 7;
    masks -= 1;
    days += 1;
    cur = (cur + 1) % 7;
}

cout << days;

int s,t,ans;
s = 2, t = 10;
ans = 0;
while (s != t){
    if (t % 2 == 0 && t / 2 >= s)
        t /= 2;
    else
        t -= 1;
    ans += 1;
}
cout << ans;

int n,i,result;

n = 81;
i = 1, result = 1;
while (i * i <= n){
    if (n % (i * i) == 0)
        result = i * i;
    i += 1;
}

cout << result;

int n,a,m,i;

n=3, a = 5;
m = (a - 1) * 2;
for (i=0; i<n-1; i++)
    m = (m - 1) * 2;

cout << m;