Compilare: user.cpp: In function ‘int main()’: user.cpp:64:32: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 3 has type ‘long long int’ [-Wformat=] fscanf(fin,"%lld ",spam); ^ user.cpp:60:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&n,&m); ^ user.cpp:64:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld ",spam); ^ user.cpp:68:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld",&x); ^ user.cpp:83:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld%lld",&a,&b,&c); ^ user.cpp:64:33: warning: ‘spam’ may be used uninitialized in this function [-Wmaybe-uninitialized] fscanf(fin,"%lld ",spam); ^