Global object is not initialized before the main function,
In the call after the global object to perform the constructor

For example:

 
The class testclass 
{
Public: 
Testclass () 
{
Dbg_print (" new testclass "); 
} 
Void test () 
{
Dbg_print (" test "); 
} 
}; 
Testclass tac. 
Int main () 
{
The (tac); 
} 

Results output:
The test
New testclass

Hope to have bosses can help to solve

CodePudding user response:

You the results of this example is absolutely new tastclass before, and it can't be you the output results

CodePudding user response:

Code is too little, where another global object initialization?

CodePudding user response:

I tested right

CodePudding user response:

This has to do with DBG you?
If use the standard input input without any problem,

CodePudding user response:

CodePudding user response:

This is just a simple example, I'm in the middle of development projects in this situation, using the GDB breakpoint debugging, measured is, indeed, I said that as a result, a member function to perform first, the object initialized again, very strange

CodePudding user response:

The platform is ubuntu 20.04

CodePudding user response:

There should be no correct output cause you don't think object structure, secretly tell you have a way to test object structure success:

 class testclass 
{
Public: 
Testclass () : I (100) 
{
Dbg_print (" new testclass "); 
} 
Void test () 
{
Dbg_print (" test ");//the value of the output I here if there is no object structure, output will be an error, I 
} 
Private: 
int i; 
}; 
Testclass tac. 
Int main () 
{
The (tac); 
} 

CodePudding user response:

 # include & lt; Stdio. H> 
The class testclass 
{
Public: 
Testclass () 
{
Printf (" % d % s: % - 4 p new testclass \ n ", a __FILE__ and __LINE__, this); 
} 
Void test () 
{
Printf (" % s: % - the 4 d % p test \ n ", a __FILE__ and __LINE__, this); 
} 
}; 
Testclass tac. 
Int main () 
{
The (tac); 
return 0; 
} 
//test. The CPP: 7 00 a93374 new testclass 
//test. The CPP: 11 00 a93374 test 

With the above method to determine the output is the same period of the source code of the same class instance?

CodePudding user response:

The eighth floor of the method is right, you simply measure not to come out, in the main function in the construction of class directly output to go,