Compilare: user.cpp: In function ‘int readN()’: user.cpp:17:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp: In function ‘int readNre(int*, int)’: user.cpp:35:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&nre[i]); ^ user.cpp:51:12: warning: ‘res’ may be used uninitialized in this function [-Wmaybe-uninitialized] return res; ^