Compilare: user.cpp: In function ‘int main()’: user.cpp:49:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(import[s[i]]>import[op[nr2]] || op[nr2]=='(' || op[nr2]==')' || s[i]=='(') ^ user.cpp:49:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(import[s[i]]>import[op[nr2]] || op[nr2]=='(' || op[nr2]==')' || s[i]=='(') ^ user.cpp:55:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(import[s[i]]<import[op[nr2]] && j>=1) ^ user.cpp:55:54: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(import[s[i]]<import[op[nr2]] && j>=1) ^ user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in","r",stdin); ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out","w",stdout); ^ user.cpp:14:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccZKtd9g.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.