Supplementary Materials-程式設計筆記

補充資料

Literal Constant

Ex:

#include <iostream>
using namespace std;
int main(){
	cout<<75<<" "<<0113<<" "<<0x4b<<"\n"; //Decimal, Octal, Hexadecimal
	cout<<75<<" "<<75u<<" "<<75l<<" "<<75ul<<" "<<75lu<<"\n"; //int, unsigned, unsigned long, usigned long
	cout<<6.02e23<<" "<<1.6e-19<<"\n"; //6.02*10^23
}

Bitwise Operators

#include <iostream>
#include <bitset>
using namespace std;
int main(){
	int x=0b00000001;
	int y=0b00000000;
	cout<<bitset<8>(x<<1)<<" "<<bitset<8>(x>>1)<<"\n"; //left / right shift for 1 bit 
	cout<<bitset<8>(~x)<<" "<<bitset<8>(x|y)<<" "<<bitset<8>(x&y)<<" "<<bitset<8>(x^y)<<"\n"; // not, or, and, xor
}

Dynamic Memory allocation

Reference: http://ccy.dd.ncu.edu.tw/~chen/course/Cpp/ch5/6.htm

Ex:

#include <iostream>
using namespace std;
int main(){
	int *p;
	p=new int;
	*p=100;
	cout<<*p;
	delete p; //release the memory space
}

Ex2:

#include <iostream>
using namespace std;
int main(){
	int *p=new int [5];
	for(int i=0; i<5; i++){
		*(p+i)=i;
	}
	for(int i=0; i<5; i++){
		cout<<*(p+i)<<" ";
	}
	delete []p; //release memory space
}

Linked List(寒假學)