c++ - Is cout << b || a; equivalent to (cout << b) || a;

Question

bool b = 0;
int a = 2;
cout << b || a;  // 0

---

bool b = 0;
int a = 2;
cout << (b || a);  // 1

Answer 1

<< has priority 5, which is higher than ||’s priority 12.

1   ()  []  .  ->
2   !  ~   -（负号） ++  --   &（取变量地址）*   （type）(强制类型)    sizeof 
3   * / %
4   + - 
5   >> <<  
6   > >= < <= 
7   == !=   
8   &  
9   ^   
10  |   
11  &&
12  ||
13  ?:
14   =  +=  -=  *=  /=   %=  |=   ^=   &=   >>=   <<=
15  ,