Compilare: user.cpp: In function ‘int main()’: user.cpp:41:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&n,&m); ^ user.cpp: In function ‘int drumin()’: user.cpp:20:15: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ((x<=y && x!=-1 )||y!=-1){ ^ user.cpp:20:23: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ((x<=y && x!=-1 )||y!=-1){ ^