C++语言中打印xqa这三个函数

#include

void x() { std::cout << "Function x() is called" << std::endl; }

void q() { std::cout << "Function q() is called" << std::endl; }

void a() { std::cout << "Function a() is called" << std::endl; }

int main() { x(); q(); a();

return 0;

}