Compilare: main.c: In function 'test': main.c:11:16: warning: 'return' with a value, in function returning void return 0; ^ main.c:4:6: note: declared here void test () ^~~~ main.c:7:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^~~~~~~~~~~~~~~~~~~~ main.c: In function 'main': main.c:34:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("divmul.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:35:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("divmul.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:37:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^~~~~~~~~~~~~~