Compilare: user.cpp: In function ‘void citire()’: user.cpp:7: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘void preproc()’: user.cpp:25: warning: deprecated conversion from string constant to ‘char*’ user.cpp:26: warning: deprecated conversion from string constant to ‘char*’ user.cpp:27: warning: deprecated conversion from string constant to ‘char*’ user.cpp:28: warning: deprecated conversion from string constant to ‘char*’ user.cpp:29: warning: deprecated conversion from string constant to ‘char*’ user.cpp: In function ‘char evalueaza()’: user.cpp:58: 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 rezolva()’: user.cpp:112: warning: array subscript has type ‘char’ user.cpp:112: warning: array subscript has type ‘char’ user.cpp:107: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:108: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:111: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘char solve(char, char, char)’: user.cpp:43: warning: control reaches end of non-void function /tmp/cc4nRIFp.o: In function `citire()': user.cpp:(.text+0x5e3): warning: the `gets' function is dangerous and should not be used.