【STL】boolalpha與noboolalpha

1.標頭檔
#include <ios>
2.使用說明
讓流將bool解析成為單詞true, false.

void test_boolalpha(){std::cout << "true is " << true << std::endl;std::cout << "false is " << false << std::endl;// 運行下面這個語句, 在輸出資料流中的bool值將發生變化std::cout << std::boolalpha;std::cout << "true is " << true << std::endl;std::cout << "false is " << false << std::endl;// 運行下面這個語句, 在輸出資料流中的bool值將恢複成0, 1值std::cout << std::noboolalpha;std::cout << "true is " << true << std::endl;std::cout << "false is " << false << std::endl;/* 輸出如下: true is 1false is 0true is truefalse is falsetrue is 1false is 0*/}