Mystring

来源：互联网发布：青岛数据挖掘面试编辑：程序博客网时间：2024/05/17 02:23

#ifndef __MYSTRING_H__#define __MYSTRING_H__#include <string.h>#include <malloc.h>class String{private:char *str;public:String(const char *str);String(const String& string);bool operator==(const String& str);String& operator=(const String& str);char& operator[](int i);char *string();~String();const char* GetChar()const;};#endif

#include "mystring.h"String::String(const char *str){int len=strlen(str);this->str=(char*)malloc(0);this->str=(char*)realloc(this->str,len);strcpy(this->str,str);}String::String(const String& string){int len=strlen(string.GetChar());this->str=(char*)malloc(0);this->str=(char*)realloc(this->str,len);strcpy(this->str,string.GetChar());}char* String::string(){return this->str;}String::~String(){free(this->str);}bool String::operator==(const String& str){int len1=strlen(this->str);int len2=strlen(str.GetChar());if(len1!=len2){return false;}for(int i=0;i<len1;++i){if(*(str.GetChar()+i)!=*(this->str+i)){return false;}}return true;}const char* String::GetChar()const{return this->str;}char& String::operator[](int i){return *(this->str+i);}String& String::operator=(const String& str){strcpy(this->str,str.GetChar());return *this;}

#include "mystring.h"#include <iostream>using namespace std;int main(void){String string("asfdfdfd");String string1("454545");String string2(string1);cout<<"string: "<<string.string()<<endl;cout<<"string1: "<<string1.string()<<endl;cout<<"string2: "<<string2.string()<<endl;cout<<"string==string1: "<<(string==string1)<<endl;cout<<"string[0]: "<<string[0]<<endl;string=string1;cout<<"string: "<<string.string()<<endl;return 0;}

运行结果

string: asfdfdfdstring1: 454545string2: 454545string==string1: 0string[0]: astring: 454545

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