指出下面程序中的错误,说明错误的原因,并进行改正Hinclude<iostreamh> class Studenti char namef10l: int agey lloat aver? void printStu0; int main() Student pl.p2.p3: pLage-30 retumn 0
时间: 2024-02-16 08:04:54 浏览: 60
该程序存在多个错误,包括:
1. `Hinclude<iostreamh>` 应改为 `#include<iostream>`
2. `class Studenti` 应改为 `class Student`
3. `char namef10l` 应改为 `char name[10]`
4. `: int agey` 应改为 `int age;`
5. `lloat aver?` 应改为 `float aver;`
6. `void printStu0;` 应改为 `void printStu();`
7. `pLage-30` 应改为 `p.age = 30;`
8. `retumn 0` 应改为 `return 0;`
改正后的代码如下:
```
#include <iostream>
using namespace std;
class Student {
public:
char name[10];
int age;
float aver;
void printStu();
};
void Student::printStu() {
cout << "Name: " << name << endl;
cout << "Age: " << age << endl;
cout << "Average: " << aver << endl;
}
int main() {
Student p;
p.age = 30;
p.printStu();
return 0;
}
```
相关问题
下面这段代码要实现对学生对象按照成绩降序排序。 仔细阅读代码,要求实现编程实现输出运算符“<<”和小于“<”运算符,使本程序能完成预定的排序功能。 裁判测试程序样例: #include <iostream> #include <string> #include <list> using namespace std; class Student { string name; char sex; int score; string grade; public: Student(string name, char sex, int score, string grade); friend ostream &operator<< (ostream& os, Student st) ; friend bool operator<(Student &st1, Student &st2); }; //你提交的代码将被嵌入到这里 Student::Student(string name, char sex, int score, string grade) { this->name = name; this->sex = sex; this->score = score; this->grade = grade; } int main() { list<Student> st; string name, grade; char sex; int score; for(int i = 0; i < 5; i++) { cin>>name; cin>>sex; cin>>score; cin>>grade; st.push_back(Student(name, sex, score, grade)); } st.sort(); list<Student>::iterator p = st.begin(); while(p != st.end()) { cout<<*p; p++; } return 0; } 输入样例: 在这里给出一组输入。例如: Bill M 86 JK1501 David M 98 JK1502 Mary F 78 JK1503 Adam M 83 JK1504 Rose F 96 JK1505 输出样例: 在这里给出相应的输出。例如: David M 98 JK1502 Rose F 96 JK1505 Bill M 86 JK1501 Adam M 83 JK1504 Mary F 78 JK1503
以下是实现了输出运算符“<<”和小于“<”运算符的代码:
```c++
#include <iostream>
#include <string>
#include <list>
using namespace std;
class Student {
string name;
char sex;
int score;
string grade;
public:
Student(string name, char sex, int score, string grade);
friend ostream &operator<< (ostream& os, Student st);
friend bool operator<(Student &st1, Student &st2);
};
Student::Student(string name, char sex, int score, string grade) {
this->name = name;
this->sex = sex;
this->score = score;
this->grade = grade;
}
ostream &operator<< (ostream& os, Student st) {
os << st.name << " " << st.sex << " " << st.score << " " << st.grade << endl;
return os;
}
bool operator<(Student &st1, Student &st2) {
return st1.score > st2.score;
}
int main() {
list<Student> st;
string name, grade;
char sex;
int score;
for(int i = 0; i < 5; i++) {
cin >> name;
cin >> sex;
cin >> score;
cin >> grade;
st.push_back(Student(name, sex, score, grade));
}
st.sort();
list<Student>::iterator p = st.begin();
while(p != st.end()) {
cout << *p;
p++;
}
return 0;
}
```
在上面的代码中,我们重载了输出运算符“<<”和小于“<”运算符,分别用来输出学生信息和比较学生成绩。在主函数中,我们通过list容器存储学生对象,并使用sort函数来进行排序,最后输出排序后的结果。
检查一下代码有没有错误#include<iostream> #include<vector> using namespace std; class Student{ private: string name; int id; char gender; int age; float score; public: void addStudent(string n, int i, char g, int a, float s){ name = n; id = i; gender = g; age = a; score = s; } void deleteStudent(vector<Student>& vec, int i){ vec.erase(vec.begin()+i-1); } void modifyStudent(vector<Student>& vec, int i, string n, char g, int a, float s){ vec[i-1].name = n; vec[i-1].gender = g; vec[i-1].age = a; vec[i-1].score = s; } void queryStudent(vector<Student>& vec, int i){ cout<<"姓名:"<<vec[i-1].name<<endl; cout<<"学号:"<<vec[i-1].id<<endl; cout<<"性别:"<<vec[i-1].gender<<endl; cout<<"年龄:"<<vec[i-1].age<<endl; cout<<"成绩:"<<vec[i-1].score<<endl; } }; int main(){ vector<Student> stuVec; Student stu; stu.addStudent("张三", 1, 'M', 20, 90); stuVec.push_back(stu); stu.addStudent("李四", 2, 'F', 21, 85); stuVec.push_back(stu); stu.addStudent("王五", 3, 'M', 22, 95); stuVec.push_back(stu); int op, id; string name; char gender; int age; float score; while(true){ cout<<"请选择操作:\n1.添加学生\n2.删除学生\n3.修改学生信息\n4.查询学生信息\n5.退出\n"; cin>>op; if(op==1){ cout<<"请输入学生姓名:"; cin>>name; cout<<"请输入学生学号:"; cin>>id; cout<<"请输入学生性别:"; cin>>gender; cout<<"请输入学生年龄:"; cin>>age; cout<<"请输入学生成绩:"; cin>>score; stu.addStudent(name, id, gender, age, score); stuVec.push_back(stu); cout<<"添加成功!\n"; } else if(op==2){ cout<<"请输入要删除的学生学号:"; cin>>id; for(int i=0;i<stuVec.size();i++){ if(stuVec[i].id==id){ stu.deleteStudent(stuVec,i+1); cout<<"删除成功!\n"; } } } else if(op==3){ cout<<"请输入要修改的学生学号:"; cin>>id; for(int i=0;i<stuVec.size();i++){ if(stuVec[i].id==id){ cout<<"请输入学生姓名:"; cin>>name; cout<<"请输入学生性别:"; cin>>gender; cout<<"请输入学生年龄:"; cin>>age; cout<<"请输入学生成绩:"; cin>>score; stu.modifyStudent(stuVec,i+1,name,gender,age,score); cout<<"修改成功!\n"; } } } else if(op==4){ cout<<"请输入要查询的学生学号:"; cin>>id; for(int i=0;i<stuVec.size();i++){ if(stuVec[i].id==id){ stu.queryStudent(stuVec,i+1); } } } else if(op==5){ break; } else{ cout<<"输入有误,请重新选择!\n"; } } return 0; }
这段代码是一个学生信息管理系统的程序,包括添加学生、删除学生、修改学生信息和查询学生信息等功能。它使用了一个名为 Student 的类来表示学生信息,其中包括学生姓名、学号、性别、年龄和成绩等属性,并提供了相应的方法来修改和查询这些信息。在主函数中,使用了一个 vector 容器来存储所有的学生信息,并通过一个循环来不断接受用户的操作选择,直到用户选择退出程序。代码看起来没有语法错误,但是没有对用户的输入进行严格的检查和错误处理,可能会导致程序崩溃或者出现不可预料的错误。同时,它的主要目的是演示如何使用类和容器来实现一个简单的学生信息管理系统,具体实现细节还需要根据实际需求进行修改和完善。
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