Borderou de evaluare (job #92229)

Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:46:10: warning: unused variable ‘flag’ [-Wunused-variable] user.cpp: In constructor ‘myIfstream::myIfstream(const char*)’: user.cpp:31:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘int main()’: user.cpp:66:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In member function ‘void myIfstream::advance()’: user.cpp:22:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]