Compilare: user.cpp: In function ‘int main()’: user.cpp:15:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d",&length); ^ user.cpp:18:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d ",&element); ^ user.cpp:30:42: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] andValue = andValue & element; ^