Compilare: main.c: In function 'main': main.c:64:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("scara2.in","r",stdin),freopen("scara2.out","w",stdout),scanf("%d%d%d%d",&h,&n,&m,&p),genCresc(1),printf("%.2f\n",msol); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:64:36: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("scara2.in","r",stdin),freopen("scara2.out","w",stdout),scanf("%d%d%d%d",&h,&n,&m,&p),genCresc(1),printf("%.2f\n",msol); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:64:69: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("scara2.in","r",stdin),freopen("scara2.out","w",stdout),scanf("%d%d%d%d",&h,&n,&m,&p),genCresc(1),printf("%.2f\n",msol); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~