实验四

将4-20改成多文件格式

complex.h

#ifndef COMPLEX_H
#define COMPLEX_H
class Complex 
{
    public:
        Complex(double r0, double i0);
        Complex(double r0);
        Complex(Complex &c0);
        ~Complex();
        void add(Complex &c0);
        void show();
    private:
        double real, imaginary;    
};
#endif

complex.cpp

#include "Complex.h"
#include <iostream>
using namespace std;

Complex::Complex(double r0, double i0):real(r0), imaginary(i0) {
    cout << "constructor Complex(double, double) is called. " << endl;
}
        
Complex::Complex(double r0):real(r0), imaginary(0) {
    cout << "constructor Complex(double) is called. " << endl;
}
        
Complex::Complex(Complex &c0):real(c0.real), imaginary(c0.imaginary) {
    cout << "copy constructor is called." << endl;
}
        
Complex::~Complex() {
    cout << "destructor is called." << endl;
}

void Complex::add(Complex &c0){
    real +=  c0.real;
    imaginary += c0.imaginary;
}
        
void Complex::show()
{
    if (imaginary > 0)
        cout << real << "+" << imaginary << "i" << endl;
    else if( imaginary == 0)
        cout << real << endl;
    else
        cout << real << imaginary << "i" << endl;
}

main.cpp

#include <iostream>
#include "Complex.h"
using namespace std;

int main(int argc, char** argv) {
    Complex c1(3,5);
    Complex c2(4.5);
    cout << "c1 = " ;
    c1.show();
    cout << "c2 = " ;
    c2.show();
    cout << "c1 + c2 = ";
    c1.add(c2);
    c1.show();
    
    Complex c3(3,-2);
    c3.show();
    return 0;
}

 2.graph

graph.cpp

// 类graph的实现
 
#include "graph.h" 
#include <iostream>
using namespace std;

// 带参数的构造函数的实现 
Graph::Graph(char ch, int n): symbol(ch), size(n) {
}


// 成员函数draw()的实现
// 功能：绘制size行，显示字符为symbol的指定图形样式 
//       size和symbol是类Graph的私有成员数据 
void Graph::draw() {
    for(int i=1;i<=size;i++)
    {
        for(int j=1;j<=size-i;j++)
            cout<<" "; //设置空格  
        for(int k=1;k<=2*i-1;k++)
            cout<<symbol;
        cout<<endl;
        
     } 
    
    
    
      
    
    // 补足代码，实现「实验4.pdf」文档中展示的图形样式 
}

graph.h

#ifndef GRAPH_H
#define GRAPH_H

// 类Graph的声明 
class Graph {
    public:
        Graph(char ch, int n);   // 带有参数的构造函数 
        void draw();     // 绘制图形 
    private:
        char symbol;
        int size;
};


#endif

main.cpp

#include <iostream>
#include "graph.h"
using namespace std;


int main() {
    Graph graph1('*',5), graph2('$',7) ;  // 定义Graph类对象graph1, graph2 
    graph1.draw(); // 通过对象graph1调用公共接口draw()在屏幕上绘制图形 
    graph2.draw(); // 通过对象graph2调用公共接口draw()在屏幕上绘制图形
    
    return 0; 
}