Compilare: user.c: In function ‘main’: user.c:10:6: warning: unused variable ‘cont’ [-Wunused-variable] int cont = 0; ^ user.c:9:6: warning: unused variable ‘cap’ [-Wunused-variable] int cap = 1024; ^ user.c:7:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.in", "r", stdin); ^ user.c:8:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out", "w", stdout); ^ /tmp/ccg30up0.o: In function `main': user.c:(.text.startup+0x88): warning: the `gets' function is dangerous and should not be used.