[問題] ostringstream物件怎麼清空?
C++
我寫了一段包含下面的程式
ostringstream output_string;
output_string << sum[i];
output_string.clear();
可是在這之後
cout << output_string.str() << endl;
還是顯示出sum[i]的值...
請問clear不能清空ostringstream嗎?
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