Compilare: main.c: In function 'A': main.c:5:9: warning: unused variable 'i' [-Wunused-variable] int i,c,d; ^ main.c: In function 'main': main.c:13:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("multiplu2.in","r",stdin),freopen("multiplu2.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:13:39: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("multiplu2.in","r",stdin),freopen("multiplu2.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:13:75: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("multiplu2.in","r",stdin),freopen("multiplu2.out","w",stdout),scanf("%d%d",&n,&k); ^~~~~~~~~~~~~~~~~~~