In c++

-Converting an expression from infix to postfix

opstk= the empty stack; while (not end of input) { symb=next input character; if (symb is an operand) add symb to the postfix string else { while (!empty()&&prcd(stacktop(), symb)) { topsym=pop(); add topsymbto the postfix string; } /*end while*/ if (empty() II symb != )) push(symb); else /* pop the open parenthesis and discard it */ topsymb= pop(); } /* end else*/ } /* end while*/ /*output any remaining operators*/ while (!empty()) { topsymb=pop(); add topsymb to the postfix string; } /* end while*/