Compilare: user.cpp: In function ‘void read()’: user.cpp:12:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(a + 1); ^ user.cpp:13:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(b + 1); ^ /tmp/ccoBJxXz.o: In function `read()': user.cpp:(.text+0x13): warning: the `gets' function is dangerous and should not be used.