Question

priority_queue<int , vector<int> , greater<int>> Q;

C:\Documents and Settings\Administrator\桌面\jishi\haffman.cpp(7) : error C2146: syntax error : missing ',' before identifier 'Q'
C:\Documents and Settings\Administrator\桌面\jishi\haffman.cpp(7) : error C2065: 'Q' : undeclared identifier
C:\Documents and Settings\Administrator\桌面\jishi\haffman.cpp(7) : error C2143: syntax error : missing '>' before ';'
C:\Documents and Settings\Administrator\桌面\jishi\haffman.cpp(21) : error C2228: left of '.empty' must have class/struct/union type
C:\Documents and Settings\Administrator\桌面\jishi\haffman.cpp(21) : fatal error C1903: unable to recover from previous error(s); stopping compilation

错误是什么？

Answer 1

因为如果是两个连起来的>>蠢萌的编译器会把它认成输出符cout>>这个符号的。所以题主记得为编译器区分一下= =

Answer 2

priority_queue<int , vector<int> , greater<int> > Q;
最后两个尖括号中间加一个空格就应该OK了。
至于为什么.......我也不清楚

Answer 3

std::priority_queue<int , std::vector<int> , std::greater<int>/**/ > Q

编译器该换了

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