Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:17: warning: statement is a reference, not call, to function ‘exit’ [-Waddress] exit; ^ user.cpp:18:17: warning: statement has no effect [-Wunused-value] user.cpp: In function ‘void DoStuff()’: user.cpp:88:25: warning: statement is a reference, not call, to function ‘exit’ [-Waddress] exit; ^ user.cpp:88:25: warning: statement has no effect [-Wunused-value] user.cpp: In function ‘int main()’: user.cpp:94:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta3.in","r",stdin); ^ user.cpp:95:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta3.out","w",stdout); ^ user.cpp:96:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:97:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp:104:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&d); ^