Compilare: user.c: In function ‘randomSelect’: user.c:72:3: warning: ‘return’ with no value, in function returning non-void [enabled by default] return; ^ user.c: In function ‘main’: user.c:129:3: warning: passing argument 2 of ‘sscanf’ from incompatible pointer type [enabled by default] sscanf("%d", &V[i]); ^ In file included from /usr/include/features.h:357:0, from /usr/include/stdio.h:28, from user.c:1: /usr/include/stdio.h:454:12: note: expected ‘const char * restrict’ but argument is of type ‘int *’ extern int __REDIRECT_NTH (sscanf, (__const char *__restrict __s, ^ user.c: In function ‘randomSelect’: user.c:84:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:120:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sdo.in", "r", stdin); ^ user.c:121:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("sdo.out", "w", stdout); ^ user.c:123:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &len, &demandedIndex); ^