Error in compilation

[AlexisPister]

Hello,

Thanks for sharing your implementation

However, I cannot compile the program on my computer, I am on Ubuntu 20.04

Here is the error message :

graphlet_utils.cpp: In function ‘bool fexists(const char*)’:
graphlet_utils.cpp:42:12: error: cannot convert ‘std::ifstream’ {aka ‘std::basic_ifstream<char>’} to ‘bool’ in return
   42 |     return ifile;
      |            ^~~~~
make: *** [Makefile:47: pgd] Error 1

Thank you for your help

[lunaticbg]

Do you solve this problem? I also met the bug ...

[lunaticbg]

I solved it with change the type of ifile into static_cast(ifile);

return static_cast<bool>(ifile);

[TerryLee77]

I solved it with change the type of ifile into static_cast(ifile);

return static_cast<bool>(ifile);

But I still met the bug after change the type.And here is the erroe message``

I solved it with change the type of ifile into static_cast(ifile);

return static_cast<bool>(ifile);

I tried. But after that I still have problem.And the Error message: collect2: error: ld returned 1 exit status make: *** [Makefile:47：pgd] Error 1

[DRealHammer]

I solved it with change the type of ifile into static_cast(ifile);

return static_cast<bool>(ifile);

is maybe a bit weird and seems not to work

as the function is only used to verify, if a file exists and can be accessed:

if (!fexists(graph.c_str()) ) { cout << "File not found!" << endl; return; }

we can just change it to the statement

return ifile.is_open();

works for compiling so far