Defining a object by this way - Test object();
up vote
-3
down vote
favorite
There are some errors,and I can not find them,so I search your help,thanks.
Errors:obj1.print();obj2.print();
Tips:expressions must contain class types.
Changing code and get following output:
TestClass1:0
TestClass2
Attention:
- Do not alter the main function.
- Do not add or delete rows.
- Do not modify the structure of program.
`
struct TestClass1 {
TestClass1(int i=0) {
m_i = i;
}
void print() {
cout << "TestClass1:" << m_i << endl;
}
int m_i;
};
class TestClass2 {
public:
TestClass2(int) {}
void print() {
cout << "TestClass2" << endl;
}
private:
~TestClass2() { }
};
int main() {
TestClass1 obj1();
TestClass2 obj2();
obj1.print();
obj2.print();
return 0;
}
`
c++
asked Nov 20 at 14:41
Kuusi
11
add a comment |
up vote
-3
down vote
favorite
There are some errors,and I can not find them,so I search your help,thanks.
Errors:obj1.print();obj2.print();
Tips:expressions must contain class types.
Changing code and get following output:
TestClass1:0
TestClass2
Attention:
- Do not alter the main function.
- Do not add or delete rows.
- Do not modify the structure of program.
`
struct TestClass1 {
TestClass1(int i=0) {
m_i = i;
}
void print() {
cout << "TestClass1:" << m_i << endl;
}
int m_i;
};
class TestClass2 {
public:
TestClass2(int) {}
void print() {
cout << "TestClass2" << endl;
}
private:
~TestClass2() { }
};
int main() {
TestClass1 obj1();
TestClass2 obj2();
obj1.print();
obj2.print();
return 0;
}
`
c++
asked Nov 20 at 14:41
Kuusi
11
1
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
Vexing parse forTestClass1 obj1();, -> function declaration
– Jarod42
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20
add a comment |
up vote
-3
down vote
favorite
up vote
-3
down vote
favorite
There are some errors,and I can not find them,so I search your help,thanks.
Errors:obj1.print();obj2.print();
Tips:expressions must contain class types.
Changing code and get following output:
TestClass1:0
TestClass2
Attention:
- Do not alter the main function.
- Do not add or delete rows.
- Do not modify the structure of program.
`
struct TestClass1 {
TestClass1(int i=0) {
m_i = i;
}
void print() {
cout << "TestClass1:" << m_i << endl;
}
int m_i;
};
class TestClass2 {
public:
TestClass2(int) {}
void print() {
cout << "TestClass2" << endl;
}
private:
~TestClass2() { }
};
int main() {
TestClass1 obj1();
TestClass2 obj2();
obj1.print();
obj2.print();
return 0;
}
`
c++
asked Nov 20 at 14:41
Kuusi
11
There are some errors,and I can not find them,so I search your help,thanks.
Errors:obj1.print();obj2.print();
Tips:expressions must contain class types.
Changing code and get following output:
TestClass1:0
TestClass2
Attention:
- Do not alter the main function.
- Do not add or delete rows.
- Do not modify the structure of program.
`
struct TestClass1 {
TestClass1(int i=0) {
m_i = i;
}
void print() {
cout << "TestClass1:" << m_i << endl;
}
int m_i;
};
class TestClass2 {
public:
TestClass2(int) {}
void print() {
cout << "TestClass2" << endl;
}
private:
~TestClass2() { }
};
int main() {
TestClass1 obj1();
TestClass2 obj2();
obj1.print();
obj2.print();
return 0;
}
`
c++
c++
asked Nov 20 at 14:41
Kuusi
11
asked Nov 20 at 14:41
Kuusi
11
edited Nov 21 at 14:26
asked Nov 20 at 14:41
Kuusi
11
asked Nov 20 at 14:41
Kuusi
11
asked Nov 20 at 14:41
Kuusi
11
11
1
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
Vexing parse forTestClass1 obj1();, -> function declaration
– Jarod42
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20
add a comment |
1
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
Vexing parse forTestClass1 obj1();, -> function declaration
– Jarod42
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20
1
1
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
Vexing parse for
TestClass1 obj1();, -> function declaration– Jarod42
Nov 20 at 14:48
Vexing parse for
TestClass1 obj1();, -> function declaration– Jarod42
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
Without changing the structure of the program I can only point out the problems.
TestClass2does not have a default constructor to initialize inTestClass2 obj2();
TestClass2destructor is private: "error: temporary of type 'TestClass2' has private destructor"- You don't indicate what standard you are compiling to, C++17 the preferred method of initializing objects is using braces eg:
TestClass1 obj1{};or nothing:TestClass1 obj1;: "warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]" - Constructors taking a single argument should be declared
explicitto prevent unwanted conversion, unless that is what you want.
With those changes I get the following output when run:
TestClass1:0
TestClass2
answered Nov 20 at 15:11
Richard
8,81221423
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
add a comment |
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up vote
0
down vote
Without changing the structure of the program I can only point out the problems.
TestClass2does not have a default constructor to initialize inTestClass2 obj2();
TestClass2destructor is private: "error: temporary of type 'TestClass2' has private destructor"- You don't indicate what standard you are compiling to, C++17 the preferred method of initializing objects is using braces eg:
TestClass1 obj1{};or nothing:TestClass1 obj1;: "warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]" - Constructors taking a single argument should be declared
explicitto prevent unwanted conversion, unless that is what you want.
With those changes I get the following output when run:
TestClass1:0
TestClass2
answered Nov 20 at 15:11
Richard
8,81221423
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
add a comment |
up vote
0
down vote
Without changing the structure of the program I can only point out the problems.
TestClass2does not have a default constructor to initialize inTestClass2 obj2();
TestClass2destructor is private: "error: temporary of type 'TestClass2' has private destructor"- You don't indicate what standard you are compiling to, C++17 the preferred method of initializing objects is using braces eg:
TestClass1 obj1{};or nothing:TestClass1 obj1;: "warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]" - Constructors taking a single argument should be declared
explicitto prevent unwanted conversion, unless that is what you want.
With those changes I get the following output when run:
TestClass1:0
TestClass2
answered Nov 20 at 15:11
Richard
8,81221423
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
add a comment |
up vote
0
down vote
up vote
0
down vote
Without changing the structure of the program I can only point out the problems.
TestClass2does not have a default constructor to initialize inTestClass2 obj2();
TestClass2destructor is private: "error: temporary of type 'TestClass2' has private destructor"- You don't indicate what standard you are compiling to, C++17 the preferred method of initializing objects is using braces eg:
TestClass1 obj1{};or nothing:TestClass1 obj1;: "warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]" - Constructors taking a single argument should be declared
explicitto prevent unwanted conversion, unless that is what you want.
With those changes I get the following output when run:
TestClass1:0
TestClass2
answered Nov 20 at 15:11
Richard
8,81221423
Without changing the structure of the program I can only point out the problems.
TestClass2does not have a default constructor to initialize inTestClass2 obj2();
TestClass2destructor is private: "error: temporary of type 'TestClass2' has private destructor"- You don't indicate what standard you are compiling to, C++17 the preferred method of initializing objects is using braces eg:
TestClass1 obj1{};or nothing:TestClass1 obj1;: "warning: empty parentheses interpreted as a function declaration [-Wvexing-parse]" - Constructors taking a single argument should be declared
explicitto prevent unwanted conversion, unless that is what you want.
With those changes I get the following output when run:
TestClass1:0
TestClass2
answered Nov 20 at 15:11
Richard
8,81221423
answered Nov 20 at 15:11
Richard
8,81221423
answered Nov 20 at 15:11
Richard
8,81221423
answered Nov 20 at 15:11
Richard
8,81221423
8,81221423
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
add a comment |
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
Thank you for your assistance,I changed constructor of TestClass2 to a default constructor and have made private destructor to public,but it is forbided to change TestClass1 obj1() to any ohter types,so I also can not run the code successful.
– Kuusi
Nov 21 at 14:38
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
If you are forbidden to change the initialization idiom, then what standard are you required to compile with?
– Richard
Nov 23 at 13:04
Any standard can
– Kuusi
Nov 28 at 14:34
Any standard can
– Kuusi
Nov 28 at 14:34
add a comment |
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1
There are some errors... what are the errors?
– Blaze
Nov 20 at 14:45
Vexing parse for
TestClass1 obj1();, -> function declaration– Jarod42
Nov 20 at 14:48
This will never work without changing the contents of the main function (see: most vexing parse).
– Rene
Nov 20 at 14:48
@Rene: You forget power of (:evil:) MACRO.
– Jarod42
Nov 20 at 15:37
@Blaze Errors: obj1.print();obj2.print(); Tips:expressions must contain class types
– Kuusi
Nov 21 at 14:20