Compilare: user.cpp: In function ‘int main()’: user.cpp:60:20: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(l<=r&ok==0) ^ user.cpp:108:16: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<mij<<"\n"; ^ user.cpp:79:16: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<mij<<"\n"; ^