Compilare: user.cpp: In function ‘int main()’: user.cpp:8:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr,i,n,s; ^ user.cpp:8:12: warning: unused variable ‘i’ [-Wunused-variable] int nr,i,n,s; ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("noname3.in","r",stdin); ^ user.cpp:10:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("noname3.out","w",stdout); ^ user.cpp:11:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i %i", &n,&s); ^