Compilare: user.cpp: In function ‘long unsigned int cautbin(long unsigned int, long unsigned int, long unsigned int, long unsigned int)’: user.cpp:10:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] { if(st==dr) ^ user.cpp:40:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(x==a[mid]) if(a[mid-1]<x) return mid; else return cautbin(st,mid-1,2,x); ^ user.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type] } ^