Compilare: user.cpp: In function ‘int main()’: user.cpp:83:15: warning: unused variable ‘j’ [-Wunused-variable] int i,s=0,j; ^ user.cpp: In function ‘void cit()’: user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&k); ^ user.cpp:21:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&i,&j); ^