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Update 中括号重载.cpp

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Francis 2020-06-14 19:28:32 +08:00 committed by GitHub
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1 changed files with 49 additions and 42 deletions
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practical_exercises/key_exercises/中括号重载.cpp
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@ -1,51 +1,58 @@
//Eg8-9.cpp
#include <iostream> #include <iostream>
#include <cstring> #include <cstring>
using namespace std; using namespace std;
struct Person{ //职工基本信息的结构 struct Person
{ //职工基本信息的结构
double salary; double salary;
char *name; char *name;
}; };
class SalaryManaege{ class SalaryManaege
Person *employ; //存放职工信息的数组 {
int max; //数组下标上界 Person *employ; //存放职工信息的数组
int n; //数组中的实际职工人数 int max; //数组下标上界
int n; //数组中的实际职工人数
public: public:
SalaryManaege(int Max=0){ SalaryManaege(int Max = 0)
max=Max; {
n=0; max = Max;
employ=new Person[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 //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 double &operator[](char *Name)
{ //重载[]，返回引用
Person *p; Person *p;
for(p=employ;p<employ+n;p++) for (p = employ; p < employ + n; p++)
//如果存在处理 //如果存在处理
if(strcmp(p->name,Name)==0) if (strcmp(p->name, Name) == 0)
return p->salary; return p->salary;
//不存在情况处理 //不存在情况处理
p=employ + n++; p = employ + n++;
p->name=new char[strlen(Name)+1]; p->name = new char[strlen(Name) + 1];
strcpy(p->name,Name); strcpy(p->name, Name);
p->salary=0; p->salary = 0;
return p->salary; return p->salary;
} }
void display(){ void display()
for(int i=0;i<n;i++) {
cout<<employ[i].name<<" "<<employ[i].salary<<endl; for (int i = 0; i < n; i++)
cout << employ[i].name << " " << employ[i].salary << endl;
}
~SalaryManaege() {
delete employ;
} }
}; };
int main(){ int main()
{
SalaryManaege s(3); SalaryManaege s(3);
s["张三"]=2188.88; s["张三"] = 2188.88;
s["里斯"]=1230.07; s["里斯"] = 1230.07;
s["王无"]=3200.97; s["王无"] = 3200.97;
cout<<"张三\t"<<s["张三"]<<endl; cout<<"里斯\t"<<s["里斯"]<<endl; cout << "张三\t" << s["张三"] << endl;
cout<<"王无\t"<<s["王无"]<<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"; cout << "-------下为display的输出--------\n\n";
s.display(); s.display();
system("pause");
} }