C ++编程中的替代令牌
C++中的替代令牌是一组特殊的符号和单词,用于表示某些运算符和标点符号。
以下是替代令牌,
语法:
%:define Becomes, #define
替代令牌的C++程序
范例1:
//C ++程序演示示例
//替代令牌
# include <iostream>
using namespace std;
%:define MSG "Hello, world!"
%:define COUNTRY "INDIA"
int main()<%
cout << "//我的消息是: " << MSG << endl;
cout << "//我的国家是: " << COUNTRY << endl;
return 0;
%>输出:
//我的消息是: Hello, world! //我的国家是: INDIA
范例2:
/*
C++ example to demonstrate the use of
alternative operator keywords
*/
#include <iostream>
#include <bitset>
using namespace std;
int main(){
int a = 10;
bitset<4> value("1111");
bitset<4> mask1("1010");
//和(或不是)not_eq关键字
cout << "a: " << a << endl;
cout << "(a>5 and a<20): " << (a > 5 and a < 20) << endl;
cout << "(a>5 or a<20): " << (a > 5 or a < 20) << endl;
cout << "not(a>5 and a<20): " << not(a > 5 and a < 20) << endl;
cout << "(a not_eq 5): " << (a not_eq 5) << endl;
//bitand,bitor,compl和and_eq,or_eq-
//xor,xor_eq关键字
cout << "value: " << value << endl;
cout << "mask1: " << mask1 << endl;
cout << "(value bitand mask1): " << (value bitand mask1) << endl;
cout << "(value bitor mask1): " << (value bitor mask1) << endl;
cout << "(value xor mask1): " << (value xor mask1) << endl;
cout << "compl value: " << compl value << endl;
value and_eq mask1;
cout << "value and_eq mask1: " << value << endl;
value or_eq mask1;
cout << "value or_eq mask1: " << value << endl;
value xor_eq mask1;
cout << "value xor_eq mask1: " << value << endl;
return 0;
}输出结果
a: 10 (a>5 and a<20): 1 (a>5 or a<20): 1 not(a>5 and a<20): 0 (a not_eq 5): 1 value: 1111 mask1: 1010 (value bitand mask1): 1010 (value bitor mask1): 1111 (value xor mask1): 0101 compl value: 0000 value and_eq mask1: 1010 value or_eq mask1: 1010 value xor_eq mask1: 0000