Compilare: user.cpp: In function ‘int getInt()’: user.cpp:18:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp:26:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,maxb,1,fin),ptr=0; ^ user.cpp: In function ‘int main()’: user.cpp:63:23: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << x << ' ' << y << ' ' << mx; ^ user.cpp:63:10: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << x << ' ' << y << ' ' << mx; ^