Eroare de compilare: user.cpp: In function ‘int finddifmin(node*)’: user.cpp:94:17: error: return-statement with no value, in function returning ‘int’ [-fpermissive] if (a==nil) return; ^ 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:99:29: 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:100:31: 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:104:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",ss); s=ss; ^ user.cpp:110:33: 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:111:33: 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:114:33: 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:115:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^