Compilare: user.c:15:1: warning: return type defaults to ‘int’ [enabled by default] main(i){freopen("biti.in","r",stdin),freopen("biti.out","w",stdout);scanf("%d",&i);printf("%s\n%s",l[i],c[i]);} ^ user.c: In function ‘main’: user.c:15:1: warning: type of ‘i’ defaults to ‘int’ [enabled by default] user.c:15:16: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] main(i){freopen("biti.in","r",stdin),freopen("biti.out","w",stdout);scanf("%d",&i);printf("%s\n%s",l[i],c[i]);} ^ user.c:15:45: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] main(i){freopen("biti.in","r",stdin),freopen("biti.out","w",stdout);scanf("%d",&i);printf("%s\n%s",l[i],c[i]);} ^ user.c:15:74: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] main(i){freopen("biti.in","r",stdin),freopen("biti.out","w",stdout);scanf("%d",&i);printf("%s\n%s",l[i],c[i]);} ^