下面两个程序做比较，为什么第一个程序没问题，第二个程序有问题？
第一个程序：

#include <iostream>
#include <string.h>

class Student
{
public:
    Student::Student(char *n = "zhangsan", int a = 23, int i = 1009, int g = 3, int r = 90)
    {
        strcpy(name,n);
        age = a;
        id = i;
        grade = g;
        result = r;
        std::cout << name << "  " << age << "  " << id << "  " << grade << "  " << result << std::endl;
    }
protected:
    char name[30];
    int age;
    int id;
    int grade;
    int result;
};

int main()
{
    Student st("lisi");
    return 0;
}

第二个程序：

#include <iostream>
#include <string.h>

class Student
{
public:
    Student::Student(char *n, int a, int i, int g, int r)；
protected:
    char name[30];
    int age;
    int id;
    int grade;
    int result;
};

int main()
{
    Student st("lisi");
    return 0;
}

Student::Student(char *n = "zhangsan", int a = 23, int i = 1009, int g = 3, int r = 90)
{
    strcpy(name,n);
    age = a;
    id = i;
    grade = g;
    result = r;
    std::cout << name << "  " << age << "  " << id << "  " << grade << "  " << result << std::endl;
}

回复 2楼 xufen340

谢谢前辈，我再好好看看这块的知识吧