Compilare: user.cpp: In function ‘int main()’: user.cpp:2:35: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] #define pf(x) fprintf(f2,"%lld ",x) ^ user.cpp:18:5: note: in expansion of macro ‘pf’ pf(1); ^ user.cpp:9:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%lld",&an); ^