Compilare: user.cpp: In function ‘int finddifmin(node*)’: user.cpp:95:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int findmin(node*)’: user.cpp:78:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int findmax(node*)’: user.cpp:83:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:97:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zeap.in","r",stdin); ^ user.cpp:98:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zeap.out","w",stdout); ^ user.cpp:102:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",ss); s=ss; ^ user.cpp:105:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] if (s=="I") { scanf("%d",&x); nr++; insert(root,x,rand()+1); y=0; } else ^ user.cpp:106:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] if (s=="S") { scanf("%d",&x); ok=false; erase(root,x); y=0; ^ user.cpp:109:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] if (s=="C") { scanf("%d",&x); printf("%d\n",find(root,x)); y=0; } ^ user.cpp:110:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^