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C++条件编译
#include <iostream> using namespace std; #define DEBUG #define MIN(a,b) (((a)<(b)) ? a : b) int main () {
C++ #和##运算符
#include <iostream> using namespace std; #define MKSTR( x ) #x int main () { cout << MKSTR(HELLO C++) << endl;
C++动态内存分配
#include <iostream> using namespace std; class Box { public: Box() { cout << "Constructor called!" <<endl;
C++ new和delete操作符
#include <iostream> using namespace std; int main () { double* pvalue= NULL; // Pointer initialized with null
C++定义新异常
#include <iostream> #include <exception> using namespace std; struct MyException : public exception {
C++除零异常
#include <iostream> using namespace std; double division(int a, int b) { if( b == 0 ) { throw "Division by zero condition!";
C++读写示例
#include <fstream> #include <iostream> using namespace std; int main () { char data[100]; // open a file in write mode.
C++抽象类
#include <iostream> using namespace std; // Base class class Shape { public: // pure virtual function providing interface framework.
C++数据封装
#include <iostream> using namespace std; class Adder { public: // constructor Adder(int i = 0) { total = i;
C++数据抽象示例
#include <iostream> using namespace std; class Adder { public: // constructor Adder(int i = 0) { total = i;
C++字符常量
#include <iostream> using namespace std; int main() { char newline = '\\n'; char tab = '\\t';
C++浮点常数
// #include<iostream> using namespace std; int main() { const float PI = 3.141;// 3.141 is floating point constant while PI is a constant float.
C++ setw()函数
// #include <iostream> #include <iomanip> int main() { std::cout << "no setw:" << 42 << '\\n'
C++重载递增++和递减 --
#include <iostream> using namespace std; class Time { private: int hours;// 0 to 23 int minutes;// 0 to 59
C++函数调用运算符()重载
#include <iostream> using namespace std; class Distance { private: int feet;// 0 to infinite int inches;// 0 to 12
C++下标[]运算符重载
#include <iostream> using namespace std; const int SIZE = 10; class safearay { private: int arr[SIZE];