单选题库

int N, M;
cout << "请输入幸运数字：";
cin >> N;
cout << "请输入正整数：";
cin >> M;

bool Lucky;
if (M % N == 0)
    Lucky = true;
else
    Lucky = false;
while (M){
    if (M % 10 == N && Lucky){
        printf("%d是%d的超级幸运数!", M, N);
        break;
    }
    M /= 10;
}
if (M == 0)
    if (Lucky)
        printf("%d是%d的幸运数!", M, N);
    else
        printf("%d非%d的幸运数!", M, N);

int cnt1 = 0, cnt2 = 0;
for (int i = 0; i < 10; i++){
    if (i % 2 == 0)
        continue;
    if (i % 2)
        cnt1 += 1;
    else if (i % 3 == 0)
        cnt2 += 1;
}
cout << cnt1 << " " << cnt2;

for (int i = 1; i < 6; i++){ // L1
    for (int j = 1; j < i+1; j++) //L2
        cout << i*j << " ";
    cout << endl;
}

int N;
cin >> N;
bool Flag = true;
for ( int i = 2; i < N; i++){
    if (i * i > N)
        break;
    if (N % i == 0){
        Flag = false;
        break;
    }
}
if (Flag)
    cout << N << "是质数" << endl;
else
    cout << N << "不是质数" << endl;