Compilare: user.c: In function ‘main’: user.c:10:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]!=t[i]) ^ user.c:6:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("ceas2.in","r",stdin),freopen("ceas2.out","w",stdout),gets(s),gets(t); ^ user.c:6:39: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("ceas2.in","r",stdin),freopen("ceas2.out","w",stdout),gets(s),gets(t); ^ user.c:6:68: warning: ignoring return value of ‘gets’, declared with attribute warn_unused_result [-Wunused-result] freopen("ceas2.in","r",stdin),freopen("ceas2.out","w",stdout),gets(s),gets(t); ^ user.c:6:76: warning: ignoring return value of ‘gets’, declared with attribute warn_unused_result [-Wunused-result] freopen("ceas2.in","r",stdin),freopen("ceas2.out","w",stdout),gets(s),gets(t); ^ /tmp/cc1GsSNG.o: In function `main': user.c:(.text.startup+0x55): warning: the `gets' function is dangerous and should not be used.