Compilare: user.c: In function ‘wins_for’: user.c:26:5: warning: missing braces around initializer [-Wmissing-braces] int t[3][3] = {0}; ^ user.c:26:5: warning: (near initialization for ‘t[0]’) [-Wmissing-braces] user.c: In function ‘main’: user.c:44:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("xsizero.in","rt",stdin); ^ user.c:45:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("xsizero.out","wt",stdout); ^ user.c:66:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("CON","rt",stdin); ^ user.c:67:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("CON","wt",stdout); ^