Compilare: user.cpp: In function ‘int main()’: user.cpp:35:16: warning: unused variable ‘i’ [-Wunused-variable] { long long n,i,j,k,t; ^ user.cpp:35:18: warning: unused variable ‘j’ [-Wunused-variable] { long long n,i,j,k,t; ^ user.cpp:35:20: warning: unused variable ‘k’ [-Wunused-variable] { long long n,i,j,k,t; ^ user.cpp: In function ‘void cit(long long int&)’: user.cpp:19:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LIM,fila); ^ user.cpp:30:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,LIM,fila); ^