结构体作为函数参数(值传递,引用传递,指针传递)

一、值传递
#include <iostream>
#include <string>
using namespace std;

struct Student
{
    int id;
    string name;
    float score[2];
};
void OutCome(Student s)
{
    cout<<s.id<<','<<s.name<<','<<s.score[0]<<','<<s.score[1]<<endl;
}
int main()
{
    Student stu={2013666,"Tom",{88,99}};
    OutCome(stu);
    return 0;
}


二、引用传递
#include <iostream>
#include <string>
using namespace std;

struct Student
{
    int id;
    string name;
    float score[2];
};
//引用传递不会进行内存重新分配,因此和指针传参类似,效率很高
void OutCome(Student &s)  //引用传参
{
    cout<<s.id<<','<<s.name<<','<<s.score[0]<<','<<s.score[1]<<endl;
}

int main()
{
    Student stu={2013666,"Tom",{88,99}};
    OutCome(stu);
    return 0;
}


三、指针传递
把结构体的指针作为实参

#include <iostream>
#include <string>
using namespace std;

struct Student
{
    int id;
    string name;
    float score[2];
};

void OutCome(Student *s)
{
    //注意指针访问结构体就不能用“.”啦,要用“->”
    cout<<s->id<<','<<s->name<<','<<s->score[0]<<','<<s->score[1]<<endl;
}
int main()
{
    Student stu={2013666,"Tom",{88,99}};
    OutCome(&stu);   //这种写法不是特别规范,但可以清晰表明传递的实际上是地址
    //嘿嘿,下面这样写才清晰
    //Student *p=&stu;
    //OutCome(p)
    return 0;
}
 

转载于:https://blog.csdn.net/shadowflow/article/details/75006450

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转载自blog.csdn.net/qq_40763929/article/details/83446600