Compilare: user.cpp: In function ‘int variabile()’: user.cpp:17: warning: array subscript has type ‘char’ user.cpp:19: warning: array subscript has type ‘char’ user.cpp:28: warning: array subscript has type ‘char’ user.cpp: In function ‘bool evaluare(char*)’: user.cpp:53: warning: array subscript has type ‘char’ user.cpp:80: warning: array subscript has type ‘char’ user.cpp:80: warning: array subscript has type ‘char’ user.cpp: In function ‘void generare(int)’: user.cpp:108: warning: array subscript has type ‘char’ user.cpp: In function ‘int main()’: user.cpp:118: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:119: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:124: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:127: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:128: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘bool eval(bool, bool, char)’: user.cpp:42: warning: control reaches end of non-void function /tmp/ccYvN5uJ.o: In function `main': user.cpp:(.text+0x6c3): warning: the `gets' function is dangerous and should not be used.