asp教程.net bool逻辑用法
#include
using namespace std;
int main() {
bool b;
b = false;
cout << "b is " << b << "n";
b = true;
cout << "b is " << b << "n";
if(b) cout << "This is executed.n";
b = false;
if(b) cout << "This is not executed.n";
return 0;
}
实例2
#include
using namespace std;
int main() {
bool b;
b = false;
cout << "b is " << b << "n";
b = true;
cout << "b is " << b << "n";
if(b) cout << "This is executed.n";
b = false;
if(b) cout << "This is not executed.n";
return 0;
}
b is 0
b is 1
This is executed.
测试一下bool 长度
#include
int main()
{
using std::cout;
cout << "The size of a bool is:" << sizeof(bool) << " bytes.n";
return 0;
}
实例4
#include
using namespace std;
int main(void)
{
int age;
char choice;
bool citizen;
cout << "Enter your age: ";
cin >> age;
cout << "Are you a citizen (Y/N): ";
cin >> choice;
if (choice == 'Y')
citizen = true;
else
citizen = false;
if (age >= 18 && citizen == true)
cout << "You are eligible to vote";
else
cout << "You are not eligible to vote";
return 0;
}
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