C++
C++const详解
const与宏定义的区别 const int r=100; 或 int const r=100 标准const变量声明加初始化，因为默认内部连接所以必须被初始化，其作 … Read more
操作系统分页虚拟存储器管理中地址变换
1. 请求分页虚拟存储管理技术是把作业地址空间的全部信息存放在磁盘上。当作业被选中运行时,,先把作业的开始几页装入主存并启动运行。为此在为作业建立页表时,应说明哪些页已在主存,哪些页不在主存。
C++STL实现图的深度与广度优先遍历（BFS&DFS）
C语言数据结构图的基本操作及遍历（存储结构为邻接矩阵）请查看：http://www.omegaxyz.com/2017/05/17/graphofds2/
C++复数类重载基本运算符
复数格式即实部＋虚部。 在C++中是个练习运算符重载很好的例子，下面的代码给出了复数类中的基本运算。 重载了运算符：
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//复数相关运算的运算符重载 #include <iostream> using namespace std; class Complex { private: double real; double image; public: Complex(){real=0;image=0;} Complex(double r,double i) { real=r; image=i; } void ShowComplex() { cout<<real; if(real>0) cout<<"+"; cout<<image<<"i"<<"\n"; } //重载 << friend ostream& operator <<(ostream &out,const Complex &c) { out<<c.real; if(c.real>0) out<<"+"; out<<c.image<<"i"<<"\n"; return out; } //重载 >> friend istream& operator >>(istream &in,Complex &c) { cout<<"input r:"<<endl; in>>c.real; cout<<"input i:"<<endl; in>>c.image; return in; } //重载 = Complex operator =(const Complex &c) { if(this == &c) return *this; //重要！防止自赋值导致低效 real=c.real; image=c.image; return *this; } //重载 -= Complex operator -=(const Complex &c2) { real-=c2.real; image-=c2.image; return *this; } //重载 +=(两个复数相加) Complex operator +=(const Complex &c2) { real+=c2.real; image+=c2.image; return *this; } //重载 +=(复数与实数相加) Complex operator +=(double c2) { real+=c2; return *this; } //重载 *= Complex operator *=(const Complex &c2) { real=real*c2.real-image*c2.image; image=image*c2.real+real*c2.image; return *this; } //重载/= Complex operator /=(const Complex &c2) { real=(real*c2.real+image*c2.image)/(c2.real*c2.real+c2.image*c2.image); image=(image*c2.real-real*c2.image)/(c2.real*c2.real+c2.image*c2.image); return *this; } //重载 +(复数相加) friend Complex operator +(const Complex &c1,const Complex &c2) { Complex c(c1); c+=c2; return c; } //重载 +(复数与实数相加) friend Complex operator +(const Complex &c1,double c2) { Complex c(c2,0); c+=c1; return c; } //重载 - friend Complex operator -(const Complex &c1,const Complex &c2) { Complex c(c1); c-=c2; return c; } //重载 * friend Complex operator *(const Complex &c1,const Complex &c2) { Complex c(c1); c*=c2; return c; } //重载 / friend Complex operator /(const Complex &c1,const Complex &c2) { Complex c(c1); c/=c2; return c; } }; int main() { Complex c; Complex c1(1.5,2.5); Complex c2(2.5,3.5); cout<<"c1:\t"; c1.ShowComplex(); cout<<"c2:\t"; c2.ShowComplex(); c=c1+c2; cout<<"c1+c2:\t"; c.ShowComplex(); cout<<"c1+5:\t"; c1+=5; c1.ShowComplex(); c=c1-c2; cout<<"c1-c2:\t"; c.ShowComplex(); c=c1*c2; cout<<"c1*c2:\t"; c.ShowComplex(); c=c1/c2; cout<<"c1/c2:\t"; c.ShowComplex(); cin>>c1; cout<<"c:"<<c1; return 0; } |
效果：
