これがコードです。HTMLセクションにあったのは<p></p>
オプションはonDomreadyとjQuery 1.9.1でした
var operators = '+-*/()';
Array.prototype.peek = function () {
return this[this.length - 1];
};
function isDigit(c) {
return !isOperator(c);
}
function isOperator(c) {
return operators.indexOf(c) >= 0;
}
function operatorPriority(operator) {
return operator === '*' || operator === '/' ? 1 : 0;
}
function comparePriority(a, b) {
return operatorPriority(a) >= operatorPriority(b);
}
function toPostfix(infix) {
var stack = [];
stack.push('(');
infix += ')';
var count = 0;
var postfix = "";
while (stack.length > 0) {
var c = infix.charAt(count++);
if (isDigit(c)) {
postfix += c;
} else if (c === '(') {
stack.push(c);
} else if (isOperator(c)) {
while (isOperator(stack.peek())) {
if (comparePriority(stack.peek(), c)) {
postfix += stack.pop();
} else {
break;
}
}
stack.push(c);
} else { // assumed )
while (stack.peek() !== '(') {
postfix += stack.pop();
}
stack.pop();
}
}
return postfix;
}
var infix = "2+4+5";
$('p').text(toPostfix(infix));