Interview questions 1

Interview questions 1 : What does the following program print?

 1 #include <iostream>
 2 
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     int x = 2, y, z;
 8 
 9     x *= (y = z = 5); cout << x << endl;
10 
11     z = 3;
12     x == (y = z); cout << x << endl;
13 
14     x = (y == z); cout << x << endl;
15 
16     x = (y & z); cout << x << endl;
17 
18     x = (y && z); cout << x << endl;
19 
20     y = 4;
21 
22     x = (y | z); cout << x << endl;
23 
24     x = (y || z); cout << x << endl;
25 
26     return 0;
27 }
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；

posted on 2012-09-15 01:29  robin.he  阅读(123)  评论(0)    收藏  举报

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