Compilare: user.cpp: In function ‘int is_correct_expresion(int)’: user.cpp:34:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] else if (expression[cur_pos] == '[') ^ user.cpp: In function ‘int main()’: user.cpp:60:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (expression[i] == 'E') ^ user.cpp:49:22: warning: unused variable ‘check’ [-Wunused-variable] int nr_expressions, check; ^