Compilare: main.cpp: In function 'int main()': main.cpp:8:11: warning: unused variable 'i' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:17: warning: unused variable 'nr' [-Wunused-variable] int n,i,j,x,nr=0; ^~ main.cpp:6:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("oluna.in","r",stdin); ^ main.cpp:7:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("oluna.out","w",stdout); ^ main.cpp:9:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:12:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^