#include <iostream>
using namespace std;
#define X “Vito写算法”
#define Y “Deep Night”
int main() {
cout <<X <<endl <<Y<<endl ;
//define constant can substitute sth
}
#include <iostream>
using namespace std;
#define X “Vito写算法”
#define Y “Deep Night”
#define Z 1+2
#define G (1+2)
const int x = 8;
int main() {
cout <<X <<endl <<Y<<endl ;
cout << Z*Z<<endl; //would be 5,cause 1+2*1+2=5
cout << G * G<< endl; // would be 9,cause you add the ()
//x = (x + 1); //if add up the const ,this x can’t be modify
//c++ is upper and lower case sensitive
cout << x << endl;
}
#include <iostream>
using namespace std;
int main(){
//int float;//it is wrong because you can’t use the reserve key as the symbol
int a = 5;
if (a == 6) {
return -1;
}
return -2;
}
#include <iostream>
using namespace std;
int main() {
int a12_ = 520;
//int 9b_ = 22; //number can’t be the start of the literal
int a = 5;
int A = 8;
cout << a << endl << A <<endl;
int appleCount = 0;
int chuangshijiejing = 0; //pinyin can be normal if you are in the chinese group
#include <iostream>
using namespace std;
int main() {
int a12_ = 520;
//int 9b_ = 22; //number can’t be the start of the literal
int a = 5;
int A = 8;
cout << a << endl << A <<endl;
int appleCount = 0;
int chuangshijiejing = 0; //pinyin can be normal if you are in the chinese group
//variety Literal of C++
/*1.case sensitive
2.can not be started with number
3.can not be the system reserve literal
4.you can use word,number,_ as the variety Literal*/
}