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原创：
C++ 简单实现数组类泛型编程示例
1、使用模板来实现泛型编程
2、本数组应该能够存储各种基础类型，各种复杂的类类型
3、应该实现部分操作符重载
其实操作符重载满满的都是套路。
代码如下：
点击(此处)折叠或打开
模板类实现：
#include<iostream>#include <stdlib.h> #include <string.h>using namespace std;template <typename T>class myarray{ private: T* array; unsigned int lenth; public: myarray(); myarray(unsigned int len); myarray(const myarray& a); myarray& operator=(const myarray& b); T& operator[](int ind); ~myarray();};template <typename T>myarray<T>::~myarray(){ if(this->array != NULL) { delete [] this->array; this->array = NULL; }}template <typename T>myarray<T>::myarray(){ this->array = NULL; this->lenth = 0;}template <typename T>myarray<T>::myarray(unsigned int len){ this->array = new T[len]; this->lenth = len; memset(this->array,0,sizeof(T)*len);}template <typename T>myarray<T>::myarray(const myarray<T>& a){ int i; this->lenth = a.lenth; this->array = new T[a.lenth]; memset(this->array,0,sizeof(T)*a.lenth); for(i=0;i<a.lenth;i++) { *(this->array+i) = *(a.array+i); }}template <typename T>myarray<T>& myarray<T>::operator=(const myarray<T>& a){ if(this->array != NULL) { delete [] this->array;//调用类的析构函数不能用free this->array = NULL; } this->array = new T[a.lenth]; this->lenth = a.lenth; for(int i=0;i<a.lenth;i++) { *(this->array+i) = *(a.array+i);//元素对象复制调用对象的=操作符重载 } return *this;}template <typename T>T& myarray<T>::operator[](int ind){ if(ind>=this->lenth) { exit(10); } return *(this->array+ind);}#include<iostream>#include<stdlib.h>#include<string.h>#include"arra.cpp"using namespace std;class test{ private: int a; int b; char* myc; public: test() { a = 0; b = 0; myc = NULL; } test(const test& a) { this->a = a.a; this->b = a.b; this->myc = (char*)calloc(strlen(a.myc)+1,0); strcpy(this->myc,a.myc); } friend ostream& operator<<(ostream& out,test& a) { out<<a.a<<endl; out<<a.b<<endl; cout<<a.myc; return out; } ~test() { if(myc != NULL) { free(myc); myc = NULL; } } test& operator=(const test& a) { if(this->myc != NULL) { free(this->myc); this->myc = NULL; } this->a = a.a; this->b = a.b; this->myc = (char*)calloc(strlen(a.myc)+1,0); strcpy(this->myc,a.myc); return *this; } test& operator=(const char* a) { if(this->myc != NULL) { free(this->myc); this->myc = NULL; } if(a == NULL) { this->myc = (char*)calloc(1,0); return *this; } this->myc = (char*)calloc(strlen(a)+1,0); strcpy(this->myc,a); return *this; }};int main(){ myarray<test> a(3); //测试class类数组 a[0] = "asdasd"; a[1] = "test"; a[2] = "kkkk"; myarray<int> b(3); //测试int数组 b[0] = 1; b[1] = 2; b[2] = 3; myarray<char> c(3); //测试char数组 c[0] = 'a'; c[1] = 'b'; c[2] = 'c'; myarray<test> d = a;//测试myarray拷贝构造函数 for(int i=0;i<3;i++) { cout<<a[i]<<endl; cout<<d[i]<<endl; } for(int i=0;i<3;i++) { cout<<b[i]<<endl; } for(int i=0;i<3;i++) { cout<<c[i]<<endl; }}
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