当从键盘输入10 20时，以下程序段的输出结果是 。　（区分==和=）#include<iostream>using namespace std;void main(){ int num1, num2; cout<<"Please input num1 and num2:"; cin>>num1>>num2; if(num1 = num2) cout<<"num1=num2"<<endl; else cout<<"num1!= num2"<<endl;}