Compilare: main.c: In function 'main': main.c:20:9: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] gets(s); ^~~~ main.c:18:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("randuri.in","r",stdin),freopen("randuri.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:18:37: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("randuri.in","r",stdin),freopen("randuri.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./cc2Z6gPF.o: In function `main': main.c:(.text.startup+0x58): warning: the `gets' function is dangerous and should not be used.