Eroare de compilare: user.cpp: In function ‘l eval()’: user.cpp:22:9: error: ‘else’ without a previous ‘if’ else if(s[p]=='-') ^ user.cpp: In function ‘l factor()’: user.cpp:48:3: error: redefinition of ‘l factor()’ l factor() { ^ user.cpp:30:3: error: ‘l factor()’ previously defined here l factor() ^ user.cpp: In function ‘int main()’: user.cpp:70:5: error: expected primary-expression before ‘return’ return 0; ^ user.cpp:70:5: error: expected ‘;’ before ‘return’