天启AI社区

Interview questions 1 : What does the following program print?

#include <iostream>

using namespace std;

int main()
{
    int x = 2, y, z;

    x *= (y = z = 5); cout << x << endl;

    z = 3;
    x == (y = z); cout << x << endl;

    x = (y == z); cout << x << endl;

    x = (y & z); cout << x << endl;

    x = (y && z); cout << x << endl;

    y = 4;

    x = (y | z); cout << x << endl;

    x = (y || z); cout << x << endl;

    return 0;
}

1. x *= (y = z = 5); cout << x << endl;    相当于x *= y; x = 10;
2. z = 3; x == (y = z); cout << x << endl; x的值未改变 x = 10；
3. x = (y == z); cout << x << endl;       （y == z）值为1， x = 1；
4. x = (y & z); cout << x << endl;        （y & z）值为3， x = 3；
5. x = (y && z); cout << x << endl;       （y && z）值为1， x = 1；
6. y = 4； x = (y | z); cout << x << endl;（y | z）值为7， x = 7；
7. x = (y || z); cout << x << endl;       （y || z）值为1， x = 1；