Compilare: user.cpp: In function ‘int main()’: user.cpp:39:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<s.size()-1) ^ user.cpp:63:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(s[i]=='*') ^ user.cpp:12:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,i,sem,c; ^ user.cpp:13:10: warning: unused variable ‘p’ [-Wunused-variable] char p; ^