###### tags: `資料結構`
# 資料結構
#### ch0-6 func template

#### ch0-5 func

#include <iostream>
using namespace std;

//float sum(float list[], int c);
//int add(int a, int b);
//float add(float a, float b);
//int sub(int a, int b);
//float sub(float a, float b);

//define
int add(int a, int b)
{	
	return a+b;
}
float add(float a, float b)
{	
	return a+b;
}

int sub(int a, int b)
{	
	return a-b;
}

float sub(float a, float b)
{	
	return a-b;
}



int main ()
{


	int x=1;
	int y=2.5;
//	float x=1;
//	float y=2.5;
	cout << "The total is: " << add(x,y)<<endl;
	
//	int a=50;
//	int b=27;
	float a=50.897;
	float b=32.569;
	cout << "The total is: " << sub(a,b)<<endl;


	return 0;
}//end of main

#### ch0-4 if and loop 練習

#include <iostream>
using namespace std;

int main ()
{
	int n = 10;
	
	//while
	while (n>0) {
		if(n%2 == 1)
			cout << n << ", ";
		--n;
	}
	cout << " lift  off!\n";	
	
	//dowhile
	string str;
	do {
		cout << "Enter text: ";
		getline (cin,str);
		cout << "You entered: " << str << '\n';
	} while (str != "the end");
	
	
	//for
	int sum=0;
	for (int n=0; n<=10; n++)
	{
	
		if(n%2 == 0){
			n==10? cout << n : cout << n<< "+" ;
			sum+=n;
		}
	}
	cout<<"="<<sum<<endl;
	
	
	//switch case
	int x;
	cout << "please enter a number!";
	cin>>x;

	switch (x) {
	  case 1:
	  case 2:
	  case 3:
	    cout << "x is 1, 2 or 3";
	    break;
	  default:
	    cout << "x is not 1, 2 nor 3";
  }
  
	return 0;
}

#### ch0-3 char and string練習

#include <iostream>
#include <string>
#include <sstream>
using namespace std;


int main()
{
	
    string mystring,myname;
    char a=65;

    //initailize
    mystring = "This is a string";
    string test_string ("This is a book!");
    string test = mystring + " " + test_string;

    cout << mystring <<endl;
    cout << test_string <<endl;
    cout<<"this is char:"<<a<<endl;
    cout << test <<endl;
    
    cout << "What's your name?";
    cin>>myname;
    cout << "your name is "<<myname<<endl;
    
    string mystr;
    cout << "What's your name? ";
    getline (cin, mystr);//函式呼叫 
    cout << "Hello " << mystr << ".\n";
    
    cout << "What's your name? ";
    getline (cin, myname);
    cout << "Hello " << myname << ".\n";

    cout << "What is your favorite team? ";
    getline (cin, myname);
    cout << "I like " << myname << " too!\n";

    int age,g;
    string grade;
    cout << "what's your name? how old are you? What grade?";
    cin>>myname>>age>>grade;
    stringstream(grade)>>g;
    cout << "your name and age : " << myname<<"("<< age << ") and grade = "<< g*2 <<" !\n";


    return 0;
}

#### ch0-2 四則運算練習

#include <iostream>
using namespace std;

int main ()
{
  int i,a,b;
  cout << "Please enter an integer value: 1.+ 2./ 3.* 4.-:";
  cin >> i;
  
  if(i==1){
 	cout << "First value ?"<<"\n";
 	cin >> a;
  	cout << "Second vlue?"<<"\n"; 	
  	cin >> b;
  	cout << "a+b="<<a+b <<endl;
  }
  
//  if(i==2){
//  	
//  }
 
  return 0;
}

#### ch0-1 宣告和給直練習

#include <iostream>

int main()
{
	int a,b,c,d;
	float answer1,answer2,answer3,answer4;
	a=5,b=4,c=3,d=2;
	answer1 = a+b;
	answer2 = a-b;
	answer3 = c*d;
	answer4 = (float) c/d;
  	std::cout << "a+b=" <<answer1<<	std::endl;
  	std::cout << "a-b="<<answer2<<	std::endl;
  	std::cout << "c*d="<<answer3<<	std::endl;
  	std::cout << "c/d="<<answer4<<	std::endl;
  	return 0;
}

#### ch0-0 c++練習

#include <iostream>

int main()
{
  std::cout << "Hello World!";
  return 0;
}