3720 . 单选题

下列代码中,输出结果是

#include<iostream>
using namespace std;
int main() {
    double a = 0.9;
    double b = 1.0;
    if (((b - a) == 0.1)) {
        cout << "Equal" << endl;
    } else {
        cout << "Not equal" << endl;
    }
}