Compilare: main.c: In function 'main': main.c:33:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:34:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("maxd.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:40:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^~~~~~~~~~~~~~~~~~~~~~