Compilare: user.cpp: In function ‘void verifica()’: user.cpp:16:15: warning: unused variable ‘j’ [-Wunused-variable] int i,j,s=0,S=0; ^ user.cpp: In function ‘int main()’: user.cpp:35:13: warning: unused variable ‘s’ [-Wunused-variable] int i,j,s=0; ^ user.cpp:38:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld %lld",&a,&b); ^