Compilare: user.cpp: In function ‘int main()’: user.cpp:22:17: warning: unused variable ‘tc2’ [-Wunused-variable] int q,st,tc,tc2,i; ^ user.cpp:24:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&q); ^ user.cpp:26:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&x); ^