Compilare: user.cpp: In function ‘long long int calc(long long int)’: user.cpp:9:17: warning: unused variable ‘i’ [-Wunused-variable] long long k,i,m; ^ user.cpp:9:19: warning: unused variable ‘m’ [-Wunused-variable] long long k,i,m; ^ user.cpp: In function ‘long long int calc2(long long int)’: user.cpp:21:17: warning: unused variable ‘i’ [-Wunused-variable] long long k,i,m; ^ user.cpp:21:19: warning: unused variable ‘m’ [-Wunused-variable] long long k,i,m; ^ user.cpp: In function ‘int main()’: user.cpp:33:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("risc2.in","r",stdin); ^ user.cpp:34:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("risc2.out","w",stdout); ^ user.cpp:35:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&p,&x); ^ user.cpp:37:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&f[k]); ^