如何制作一个计算字符串中多个数字的计算器？

function calculateString(inputString) {
  // 解析字符串，提取数字和运算符
  const numbers = inputString.match(/\d+(\.\d+)?/g).map(Number);
  const operators = inputString.match(/[+\-*/]/g);

  // 构建计算逻辑
  const stack = [];
  let result = 0;
  let currentOperator = '+';

  for (let i = 0; i < numbers.length; i++) {
    if (currentOperator === '+') {
      stack.push(numbers[i]);
    } else if (currentOperator === '-') {
      stack.push(-numbers[i]);
    } else if (currentOperator === '*') {
      const prevNumber = stack.pop();
      stack.push(prevNumber * numbers[i]);
    } else if (currentOperator === '/') {
      const prevNumber = stack.pop();
      stack.push(prevNumber / numbers[i]);
    }

    if (i < operators.length) {
      currentOperator = operators[i];
    }
  }

  // 进行计算
  while (stack.length > 0) {
    result += stack.pop();
  }

  // 输出结果
  return result;
}

// 示例用法
const input = '1+2*3-4/2';
const result = calculateString(input);
console.log(result); // 输出结果为 6