Compilare: user.cpp: In function ‘int valid()’: user.cpp:43:9: warning: unused variable ‘i’ [-Wunused-variable] int i=1,simetric_curent; ^ user.cpp:43:13: warning: unused variable ‘simetric_curent’ [-Wunused-variable] int i=1,simetric_curent; ^ user.cpp: In function ‘void citire()’: user.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&K); ^ user.cpp: In function ‘int main()’: user.cpp:78:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.in","r",stdin); ^ user.cpp:79:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bilete.out","w",stdout); ^