Compilare: main.c: In function 'main': main.c:7:80: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration] freopen("fsb.in","r",stdin),freopen("fsb.out","w",stdout),scanf("%d\n",&n),gets(s); ^~~~ main.c:7:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("fsb.in","r",stdin),freopen("fsb.out","w",stdout),scanf("%d\n",&n),gets(s); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:33: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("fsb.in","r",stdin),freopen("fsb.out","w",stdout),scanf("%d\n",&n),gets(s); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:63: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("fsb.in","r",stdin),freopen("fsb.out","w",stdout),scanf("%d\n",&n),gets(s); ^~~~~~~~~~~~~~~~ ./ccPVftcY.o: In function `main': main.c:(.text.startup+0x49): warning: the `gets' function is dangerous and should not be used.