Compilare: user.c: In function ‘sobo’: user.c:21:9: warning: ‘return’ with a value, in function returning void [enabled by default] return 0; ^ user.c:31:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((1<<j)&x) ^ user.c:13:13: warning: variable ‘pos’ set but not used [-Wunused-but-set-variable] int i,j,pos,a,b,nr0,nr1; ^ user.c: In function ‘main’: user.c:52:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.in","r",stdin); ^ user.c:53:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.out","w",stdout); ^ user.c:54:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&l); ^ user.c:57:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",d[i]); ^ user.c:63:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p[i]); ^