c++ 中 bool 与整型之间的转换

在c++中bool类型与整型之间存在着隐式转换，bool在存储之后隐式的转换为整型存储，其中true为1，false则为0。如果用整型给bool对象赋值，非零值为true，0则为false。

#include <iostream>

using namespace std;

int main()
{
    bool t = true;
    cout << "t is true: " << t << endl;
    t = false;
    cout << "t is false: " << t << endl;
    t = 10 ;
    if(t)
    {
        cout << "t is true: " << t << endl;
    }
    else
    {
        cout << "t is false: " << t << endl;
    }
    t = -10;
    if(t)
    {
        cout << "t is true: " << t << endl;
    }
    else
    {
        cout << "t is false: " << t << endl;
    }
    t = 0;
    if(t)
    {
        cout << "t is true: " << t << endl;
    }
    else
    {
        cout << "t is false: " << t << endl;
    }
}

程序输出

t is true: 1
t is false: 0
t is true: 1
t is true: 1
t is false: 0

 

转载于:https://my.oschina.net/u/3193939/blog/2966503