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代碼中最後兩條語句的問題是什麼?io流錯誤
#include <iostream>
using namespace std;
int main()
{
cout << "2 + 4 = " << 2 + 4 << endl;
cout << "2 * 4 = " << 2 * 4 << endl;
cout << "2 | 4 = " << 2 | 4 << endl;
cout << "2 & 4 = " << 2 & 4 << endl;
我應該怎麼做才能解決這個問題?