bool型数据演示

//this program dispiay te ahlphabet
#include <iostream>
using namespace std;

int main()
{
    bool b;
 b = false;
 cout<<"b is"<<b<<"\n";
 
 b = true;
 cout<<"b is"<<b<<"\n";
 
 //a bool value can control the if statement
 if(b)cout<<"this is executed.\n";
 
 b = false;
 if(b)cout<<"this is not executed.\n";

 

//outcome of a relational operator is a true/false value

cout<<"10>9 is"<<(10>9)<<"\n";
 
 
   return 0;
}