dart - 使用Dart出现此小错误

Question

import 'dart:io';

void main() {
double base = 1, bnry = 0, remainder = 0, ans = 0, inp;
print("Please input binary number : ");
inp = stdin.readLineSync();
bnry = inp;
while(inp < 1){
    remainder = inp % 10;
    ans = ans + remainder * base;
    base = base * 2;
    inp = inp / 10;
}
print("$inp");
}

这是我的代码，这是错误消息

unhandled exception: Class 'String' has no instance method '<'. NoSuchMethodError: method not found: '<'

Answer 1

您从stdin.readLineSync()获得一个字符串。您需要将其转换为数字才能与其他数字进行比较

inp = num.parse(stdin.readLineSync());