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中括号重载.cpp
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中括号重载.cpp
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//Eg8-9.cpp
#include <iostream>
#include <cstring>
using namespace std;
struct Person{ //职工基本信息的结构
double salary;
char *name;
};
class SalaryManaege{
Person *employ; //存放职工信息的数组
int max; //数组下标上界
int n; //数组中的实际职工人数
public:
SalaryManaege(int Max=0){
max=Max;
n=0;
employ=new Person[max];
}
//返回引用特性是可以直接在放在左值,直接使用
double &operator[](char *Name) { //重载[],返回引用
Person *p;
for(p=employ;p<employ+n;p++)
//如果存在处理
if(strcmp(p->name,Name)==0)
return p->salary;
//不存在情况处理
p=employ + n++;
p->name=new char[strlen(Name)+1];
strcpy(p->name,Name);
p->salary=0;
return p->salary;
}
void display(){
for(int i=0;i<n;i++)
cout<<employ[i].name<<" "<<employ[i].salary<<endl;
}
};
int main(){
SalaryManaege s(3);
s["张三"]=2188.88;
s["里斯"]=1230.07;
s["王无"]=3200.97;
cout<<"张三\t"<<s["张三"]<<endl; cout<<"里斯\t"<<s["里斯"]<<endl;
cout<<"王无\t"<<s["王无"]<<endl;
cout<<"-------下为display的输出--------\n\n";
s.display();
system("pause");
}