Compilare: user.cpp: In function ‘void intoarce(int&)’: user.cpp:32:9: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(t>=10&t<=99) ^ user.cpp: In function ‘int main()’: user.cpp:54:9: warning: unused variable ‘w1’ [-Wunused-variable] int w1=0, w2=0; ^ user.cpp:54:15: warning: unused variable ‘w2’ [-Wunused-variable] int w1=0, w2=0; ^