想知道为何没有输出cout

#include<iostream>
using namespace std; 
int x, y, x1;
int main() {
    cout << "enter a number :";
    y = 0;
    cin >> x;
    x1 = x % 2;
    while (x != 1) {
        if (x1 == 0) { x = x / 2; }
        else { x = (x * 3 + 1) / 2; }
        y = y + 1;
    }
    cout << endl << y;
    return 0;
}

你这个代码写的有逻辑问题，会进入死循环。你的题目是什么

因为cout遇到endl就结束了
你应该把y夹中间

#include<iostream>
using namespace std;
int x, y, x1;
int main() {
    cout << "enter a number :";
    y = 0;
    cin >> x;
    x1 = x % 2;
    while (x != 1) {
        if (x1 == 0) { x = x / 2; }
        else { x = (x * 3 + 1) / 2; }
        y = y + 1;
    }
    cout << endl << y;
    system("pause");
    return 0;
}

#include<iostream>
using namespace std;
int x, y, x1;
int main()
{
    cout << "enter a number :";
    y = 0;
    cin >> x;
    while (x != 1)
    {
        x1 = x % 2;

        if (x1 == 0)
        { 
            x = x / 2; 
        }
        else 
        {
            x = (x * 3 + 1) / 2;
        }
        y = y + 1;
    }
    cout << endl << y;
    return 0;
}