Compilare: user.c: In function ‘main’: user.c:2:19: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("iunie.in", "r", stdin);freopen("iunie.out", "w", stdout);int n; scanf("%d", &n);printf("%d",n%2 == 1 ? 0 : n/4);return 0;} ^ user.c:2:51: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("iunie.in", "r", stdin);freopen("iunie.out", "w", stdout);int n; scanf("%d", &n);printf("%d",n%2 == 1 ? 0 : n/4);return 0;} ^ user.c:2:90: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("iunie.in", "r", stdin);freopen("iunie.out", "w", stdout);int n; scanf("%d", &n);printf("%d",n%2 == 1 ? 0 : n/4);return 0;} ^