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#include <iostream>
using namespace std;
 
class AcquireSaveInfo
{
private:
    struct resolution
    {
        double x,y,z;
    };
public:
       resolution AddResolutionInfo()
       {
       	 resolution r;
       	 r.x = 0;
       	 return r;
       }
};
 
int main() 
{
	AcquireSaveInfo a;
	AcquireSaveInfo::resolution result = a.AddResolutionInfo();
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:7:12: error: ‘struct AcquireSaveInfo::resolution’ is private
     struct resolution
            ^
prog.cpp:23:19: error: within this context
  AcquireSaveInfo::resolution result = a.AddResolutionInfo();
                   ^

Standard output is empty