Compilare: user.cpp: In function ‘int main()’: user.cpp:28:20: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long unsigned int’ [-Wformat=] printf("%d\n",S); ^ user.cpp:6:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie.in","r",stdin); ^ user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie.out","w",stdout); ^ user.cpp:9:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:11:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:27:14: warning: ‘B’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=B+2;i<=n;++i) S+=v[i]; ^ user.cpp:25:14: warning: ‘A’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=A+2;i<=B-1;++i) S+=v[i]; ^