Compilare: user.cpp: In function ‘int main()’: user.cpp:20:37: warning: suggest parentheses around comparison in operand of ‘^’ [-Wparentheses] if ( a[i]>=sum || a[i]^sum<=a[i] ) { p=i; q=sum; if (a[i]-(a[i]^sum)<q) q=a[i]-(a[i]^sum); } ^ user.cpp:22:25: warning: ‘q’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<p<<" "<<q; ^ user.cpp:22:16: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<p<<" "<<q; ^