转自：http://blog.csdn.net/huang_xw/article/details/8196885
1.头文件#include <ios>
2. 功能
使bool型变量按照false、true的格式输出。如不使用该标识符，那么结果会按照1、0的格式输出
void test_boolalpha() { std::cout << "true is " << true << std::endl; std::cout << "false is " << false << std::endl; // 运行下面这个语句, 在输出流中的bool值将发生变化 std::cout << std::boolalpha; std::cout << "true is " << true << std::endl; std::cout << "false is " << false << std::endl; // 运行下面这个语句, 在输出流中的bool值将恢复成0, 1值 std::cout << std::noboolalpha; std::cout << "true is " << true << std::endl; std::cout << "false is " << false << std::endl; /* 输出如下: true is 1 false is 0 true is true false is false true is 1 false is 0 */ }
转载于:https://www.cnblogs.com/claremore/p/4712155.html
