Compilare: user.cpp: In function ‘void citeste()’: user.cpp:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘void rezolva()’: user.cpp:49: warning: operation on ‘w’ may be undefined user.cpp: In function ‘int main()’: user.cpp:66: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result /tmp/cc8vGJvo.o: In function `citeste()': user.cpp:(.text+0x1b2): warning: the `gets' function is dangerous and should not be used.