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实验4

时间:2022-11-09 08:57:38浏览次数:39  
标签:Matrix m1 int 实验 x2 output include

task 5:

#include<iostream>
#include <cassert>
#include<stdlib.h>
#define value 1
using namespace std;
class vectorint
{
    public:
        vectorint(int a)
        {
          elem=new int[a];
          size=a; 
          cout<<"gouzao1"<<endl;
        }
        vectorint(int a,int b)
        {
          elem=new int[a];
          size=a;
          for(int i=0;i<a;i++) 
              elem[i]=value;
          cout<<"gouzao2"<<endl;}
        vectorint(const vectorint &v)
        {
          size=v.size;
          elem=new int[v.size];
          for(int i=0;i<v.size;i++)
            elem[i]=v.elem[i];
          cout<<"gouzao3"<<endl;
        }
        ~vectorint()
        {
            delete[] elem;
            cout<<"xigou"<<endl;
        }
        int getsize(){return size;}
        int &at(int a)
        {
            assert(a >= 0 && a < size);
            return elem[a];
        }
        friend void output(vectorint &v)
        {
            for(int i=0;i<v.size;i++)
            cout<<v.elem[i]<<" ";
            cout<<endl;
        }
    private:
        int *elem;
        int size;
};

 

 

#include <iostream>
#include "vectorint.hpp"
#define vectorInt vectorint
void test() {
    using namespace std;

    int n;
    cin >> n;
    
    vectorInt x1(n);
    for(auto i = 0; i < n; ++i)
        x1.at(i) = i*i;

    output(x1);

    vectorInt x2(n, 42);
    vectorInt x3(x2);

    output(x2);
    output(x3);

    x2.at(0) = 77;

    output(x2);
    output(x3);
}

int main() {
    test();
}

截图:

 

 

task6:

#include<iostream>
#include <cassert>
#pragma once
#include<stdlib.h>
#define x lines
#define y cols
using namespace std;
class Matrix {
public:
    Matrix(int n):x(n),y(n){p=new double[n*n];}                   // 构造函数,构造一个n*n的矩阵
    Matrix(int n, int m):x(n),y(m){p=new double[n*m];}             // 构造函数,构造一个n*m的矩阵
    Matrix(const Matrix &X):x(X.x),y(X.y)
    {
        p=new double[x*y];
        for(int i=0;i<x*y;i++)
          p[i]=X.p[i];        
    }           // 复制构造函数,使用已有的矩阵X构造
    ~Matrix(){delete[] p;}                        //析构函数

    void set(const double *pvalue)
    {
        for(int i=0;i<x*y;i++)
        p[i]=pvalue[i];
    }     // 用pvalue指向的连续内存块数据按行为矩阵赋值
    void set(int i, int j, int value){p[i*y+j]=value;} //设置矩阵第i行第j列元素值为value
    double &at(int i, int j)
    {
        assert( i>= 0 && i < x && j>=0 && j<y);
            return p[i*y+j];
    }         //返回矩阵第i行第j列元素的引用
    double at(int i, int j) const{return p[i*y+j]; }     // 返回矩阵第i行第j列元素的值
    int get_lines() const{return x;}             //返回矩阵行数
    int get_cols() const{return y;}              //返回矩列数
    void print() const
    {
        int k=0;
        for(int i=0;i<x*y;i++)
        {
            cout<<p[i]<<" ";
            k++;
            if(k==y)
            {
                cout<<endl;
                k=0;
            }
        }
    }              // 按行打印输出矩阵

private:
    int lines; // 矩阵行数
    int cols;  // 矩阵列数
    double *p; // 指向存放矩阵数据的内存块的首地址
};

// 类Matrix的实现:待补足
// ×××

 

#include <iostream>
#include "matrix.hpp"

void test() {
    using namespace std;

    double x[] = {1, 2, 3, 4, 5, 6};

    Matrix m1(3, 2);    // 创建一个3×2的矩阵
    m1.set(x);          // 用一维数组x的值按行为矩阵m1赋值
    m1.print();         // 打印矩阵m1的值
    cout << "the first line is: " << endl;
    cout << m1.at(0, 0) << " " << m1.at(0, 1) << endl;  // 输出矩阵m1第1行两个元素的值
    cout << endl;

    Matrix m2(2, 3);
    m2.set(x);
    m2.print();
    cout << "the first line is: " << endl;
    cout << m2.at(0, 0) << " " << m2.at(0, 1) << " " << m2.at(0, 2) << endl;
    cout << endl;

    Matrix m3(m2);      // 用矩阵m2构造新的矩阵m3
    m3.set(0, 0, 999);  // 将矩阵m3第0行第0列元素值设为999
    m3.print();
}

int main() {
    test();
}

 

截图:

 

标签:Matrix,m1,int,实验,x2,output,include
From: https://www.cnblogs.com/202183290359gyk/p/16872381.html

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