C++报错集合:expected unqualified-id before ‘using’

 

今天写了一个occi的C++程序,结果一编译就出了个莫名其妙的错误。 信息如下:

g++ -c TDBPro.cpp -I/u01/oracle/rdbms/public -I./
TDBPro.cpp:3: 错误:expected unqualified-id before ‘using’

 

 TDBPro.cpp 的第一行代码为头文件包含,第二行为空行,第三行就为using 命名空间 std :

#include "TDBPro.h"

 

using namespace std;

 

 

一开始以为是从windows上传到Linux上ftp的问题,直接到linux上用vi看源文件没发现问题。搞来搞去,最后发现是包含的头文件中定义类的时候没有加分号:

 

Class xxxx

{

...

};  //就是这个分号

a.cpp:35:5: error: extra qualification ‘Stud::’ on member ‘sum’ [-fpermissive] 35 | int Stud::sum=0; | ^~~~ a.cpp:35:15: error: ‘int Stud::sum’ conflicts with a previous declaration 35 | int Stud::sum=0; | ^ a.cpp:15:19: note: previous declaration ‘double Stud::sum’ 15 | static double sum; | ^~~ a.cpp:36:5: error: extra qualification ‘Stud::’ on member ‘num’ [-fpermissive] 36 | int Stud::num=0; | ^~~~ a.cpp:45:2: error: expected ‘}’ at end of input 45 | } | ^ a.cpp:9:12: note: to match this ‘{’ 9 | class Stud { | ^ a.cpp: In member function ‘void Stud::print()’: a.cpp:28:24: error: expected primary-expression before ‘,’ token 28 | cout <<number<<, name<<, score<< endl; | ^ a.cpp:28:32: error: expected primary-expression before ‘,’ token 28 | cout <<number<<, name<<, score<< endl; | ^ a.cpp:28:39: error: invalid operands of types ‘float’ and ‘<unresolved overloaded function type>’ to binary ‘operator<<’ 28 | cout <<number<<, name<<, score<< endl; | ~~~~~^~~~~~~ a.cpp: In member function ‘int Stud::main()’: a.cpp:40:8: error:class Stud’ has no member named ‘disp’ 40 | s1.disp(); | ^~~~ a.cpp:41:8: error:class Stud’ has no member named ‘disp’ 41 | s2.disp(); | ^~~~ a.cpp:42:8: error:class Stud’ has no member named ‘disp’ 42 | s3.disp(); | ^~~~ a.cpp:43:25: error: ‘avg’ is not a member of ‘Stud’ 43 | cout<<"avg="<<Stud::avg()<<endl; | ^~~ a.cpp: At global scope: a.cpp:45:2: error: expected unqualified-id at end of input 45 | } | ^
最新发布
04-03
a.cpp:35:5: error: ‘Stud’ has not been declared 35 | int Stud::sum=0; | ^~~~ a.cpp:35:15: error: ‘int Student::sum’ conflicts with a previous declaration 35 | int Stud::sum=0; | ^ a.cpp:15:19: note: previous declaration ‘double Student::sum’ 15 | static double sum; | ^~~ a.cpp:36:5: error: ‘Stud’ has not been declared 36 | int Stud::num=0; | ^~~~ a.cpp:45:2: error: expected ‘}’ at end of input 45 | } | ^ a.cpp:9:15: note: to match this ‘{’ 9 | class Student { | ^ a.cpp: In member function ‘void Student::print()’: a.cpp:28:24: error: expected primary-expression before ‘,’ token 28 | cout <<number<<, name<<, score<< endl; | ^ a.cpp:28:32: error: expected primary-expression before ‘,’ token 28 | cout <<number<<, name<<, score<< endl; | ^ a.cpp:28:39: error: invalid operands of types ‘float’ and ‘<unresolved overloaded function type>’ to binary ‘operator<<’ 28 | cout <<number<<, name<<, score<< endl; | ~~~~~^~~~~~~ a.cpp: In member function ‘int Student::main()’: a.cpp:39:5: error: ‘Stud’ was not declared in this scope 39 | Stud s1(1,"Li",89),s2(2,"Chert",78),s3(3,"zheng",94); | ^~~~ a.cpp:40:5: error: ‘s1’ was not declared in this scope 40 | s1.disp(); | ^~ a.cpp:41:5: error: ‘s2’ was not declared in this scope 41 | s2.disp(); | ^~ a.cpp:42:5: error: ‘s3’ was not declared in this scope 42 | s3.disp(); | ^~ a.cpp:43:19: error: ‘Stud’ is not a class, namespace, or enumeration 43 | cout<<"avg="<<Stud::avg()<<endl; | ^~~~ a.cpp: At global scope: a.cpp:45:2: error: expected unqualified-id at end of input 45 | } | ^
04-03
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