int led = 9;
void setup()
{
pinMode(led,OUTPUT);
}
int light = 0,add = 5;
void loop()
{
light+=add;
delay(30);
analogWrite(led,light);
if(light == 255||light == 0)
{
add = -add;
//delay(500);
}
}int buzzer = 8;
void setup() { //初始化蜂鳴器pin8為輸出
pinMode(buzzer,OUTPUT);
}
void loop() {
for(int i = 1;i <= 80;i++) //每隔2ms鳴叫一次重複80次
{
digitalWrite(buzzer,HIGH);
delay(1);
digitalWrite(buzzer,LOW);
delay(1);
}
for(int i = 1;i <= 100;i++) //每隔4ms鳴叫一次重複100次
{
digitalWrite(buzzer,HIGH);
delay(2);
digitalWrite(buzzer,LOW);
delay(2);
}
}int led[7] = {0,1,2,3,4,5,6}; //set pin number
void setup() //set pin led[1]~led[6] as OUTPUT
{
for(int i = 1;i <= 6;i++)
pinMode(led[i], OUTPUT);
}
void s1()
{
for(int i = 1;i <= 6;i++) //由1~6每200毫秒點亮一顆LED
{
digitalWrite(led[i], HIGH);
delay(200);
}
for(int i = 6;i >= 1;i--) //由6~1每200毫秒熄滅一顆LED
{
digitalWrite(led[i], LOW);
delay(200);
}
}
void s2()
{
for(int i = 3;i >= 1;i--) //由中間往外每200毫秒點亮一組LED
{
digitalWrite(led[i], HIGH);
digitalWrite(led[7-i], HIGH);
delay(200);
}
for(int i = 1;i <= 3;i++) //由外往內每200毫秒熄滅一組LED
{
digitalWrite(led[i], LOW);
digitalWrite(led[7-i], LOW);
delay(200);
}
}
void s3()
{
for(int i = 1;i <= 3;i++) //由外往內 間隔200毫秒閃爍一組LED
{
digitalWrite(led[i], HIGH);
digitalWrite(led[7-i], HIGH);
delay(200);
digitalWrite(led[i], LOW);
digitalWrite(led[7-i], LOW);
delay(200);
}
for(int i = 2;i >= 1;i--) //由內往外 間隔200毫秒閃爍一組LED
{
digitalWrite(led[i], HIGH);
digitalWrite(led[7-i], HIGH);
delay(200);
digitalWrite(led[i], LOW);
digitalWrite(led[7-i], LOW);
delay(200);
}
}
void flash()
{
for(int j = 1;j <= 2;j++) //執行兩次閃爍
{
for(int i = 1;i <= 6;i++) // 1~6全亮
{
digitalWrite(led[i],HIGH);
}
delay(200);
for(int i = 1;i <= 6;i++) //1~6全暗
{
digitalWrite(led[i],LOW);
}
delay(200);
}
}
void loop() {
s1();
flash();
s2();
flash();
s3();
flash();
}int buzzer = 8;
int i = 0,aclick = 100;
int music[500] = {6,0,10,0,9,10,0,7,0,8,0,10,9,8,7,6,0,6,10,0,9,
10,0,7,0,8,0,10,5,0,5,0,6,0,10,0,9,10,0,7,0,8,0,10,9,8,7,6,0,6,10,
0,9,10,0,7,0,8,0,10,5,0,5,0,6,0,8,0,7,8,7,0,9,0,8,0,7,8,7,5,6,0,10,
0,9,10,9,10,11,0,10,0,9,0,10,0,6,0,8,0,7,8,7,0,9,0,8,0,7,8,7,5,6,0,
10,0,9,10,9,10,12,0,10,0,9,0,10,0,6,0,8,0,7,8,7,0,9,0,8,0,7,8,7,5,6,
0,10,0,9,10,9,10,11,0,10,0,9,0,10,0,9,0,0,0,0,9,9,10,0,9,0,8,0,7,0,6,
0,0,0,0,0,-1};
int scale[50] = {0,131,147,165,175,196,220,247,262,294,330,392,440,494};
void setup() {
pinMode(buzzer,OUTPUT);
}
void loop() {
if(music[i] == -1)i = 0;
mtone(scale[music[i]]);
i++;
}
void mtone(int f) {
tone(buzzer,f);
delay(aclick);
noTone(buzzer);
}#include<iostream>
#include<cstdlib>
#include<string>
using namespace std;
class node
{
public:
int num;
node *next;
node()
{
num=0;
next=NULL;
}
};
node *add_node(node *mylist,int data)
{
node *temp_node=mylist;
if(mylist==NULL)
{
mylist=new node;
mylist->num=data;
return mylist;
}
while(temp_node->next!=NULL)
{
temp_node=temp_node->next;
}
temp_node->next=new node;
temp_node->next->num=data;
return mylist;
}
void show(node *mylist)
{
while(mylist!=NULL)
{
cout<<mylist->num<<"\n";
mylist=mylist->next;
}
return;
}
int main()
{
node *list=NULL;
for(int i=0;i<5;i++)
{
list=add_node(list,i);
}
show(list);
system("pause");
return 0;
}#include<iostream>
#include<cstring>
#define MAX_STRING 100
using namespace std;
class myString
{
friend istream& operator >> (istream&, myString&);
friend ostream& operator << (ostream&, myString&);
private:
char content[MAX_STRING];
public:
char operator [] (int);
myString operator += (myString);
};
istream &operator >> (istream &in, myString &temps)
{
in >> temps.content;
return in;
}
ostream &operator << (ostream &out, myString &temps)
{
out << temps.content;
return out;
}
char myString::operator [] (int n)
{
return content[n];
}
myString myString::operator += (myString s)
{
strcat_s(content, s.content);
return *this;
}
int main()
{
myString s1,s2;
cin >> s1 >> s2;
cout << s1[0]<<endl;
cout << (s1 += s2) << endl;
system("pause");
return 0;
}#include<iostream>
#include<cstdlib>
using namespace std;
class rec
{
private:
int width,length,area;
public:
rec(int w=1,int l=1)
{
width=w;
length=l;
area=w*l;
}
bool operator > (rec temp_rec)
{
if(area>temp_rec.area)
{
return true;
}
return false;
}
bool operator == (rec temp_rec)
{
if(area==temp_rec.area)return true;
return false;
}
};
int main()
{
rec a(5,10),b(10,6);
if(a>b)
{
cout<<"a>b\n";
}
else if(a==b)
{
cout<<"a=b\n";
}
else
{
cout<<"a<b\n";
}
system("pause");
return 0;
}#To use “|” in grep, you should use egrep.
#!/bin/bash
for i in {0000..9999};
do
echo "***** $i" | nc localhost 30002 | egrep -v "^I am|^Wrong!|^Exiting"
done#include<iostream>
#include<vector>
using namespace std;
int count = 0;
void rotate(vector<int> &list, int x, int y) {
int tmp = list[y];
for (int i = y; i > x; i--) {
list[i] = list[i-1];
}
list[x] = tmp;
}
void perm(int a, int n, vector<int> list){
if (a < n){
for (int i = a; i < n; i++) {
vector<int> tmplist(list);
rotate(tmplist, a, i);
perm(a+1, n, tmplist);
}
}
else{
for (int i = 0; i < n; i++) {
cout<<list[i]<<" ";
}
cout<<endl;
count++;
}
}
int main()
{
int n;
vector<int> list;
cin>>n;
list.resize(n);
for (int i = 0;i < n; i++) {
cin>>list[i];
}
perm(0, n, list);
cout<<"count="<<count<<endl;
return 0;
}/*(base)A->B->C->D(derived)
B* b=new C;
A* a=b; //OK
A* a=new D;
A* a=new B; //next line will return NULL
C* c=dynamic_cast<C*>(a); //OK
*/#include<iostream>
using namespace std;
class instrument
{
public:
virtual void play()=0;
};
class guitar:public instrument
{
public:
void play()
{
cout<<"Guitar played.\n";
}
};
class piano:public instrument
{
public:
void play()
{
cout<<"Piano played.\n";
}
};
int main()
{
instrument *s=new guitar;
//Guitar played
s->play();
delete s;
//Piano played
s=new piano;
s->play();
delete s;
return 0;
}