結構體作為函式引數(值傳遞,引用傳遞,指標傳遞)
一、值傳遞
#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、引用傳遞
#include <iostream>
#include <string>
using namespace std;struct Student
{
int id;
string name;
float score[2];
};
//引用傳遞不會進行記憶體重新分配,因此和指標傳參類似,效率很高
void OutCome(Student &s) //引用傳參
{
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、指標傳遞
把結構體的指標作為實參#include <iostream>
#include <string>
using namespace std;struct Student
{
int id;
string name;
float score[2];
};void OutCome(Student *s)
{
//注意指標訪問結構體就不能用“.”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); //這種寫法不是特別規範,但可以清晰表明傳遞的實際上是地址
//嘿嘿,下面這樣寫才清晰
//Student *p=&stu;
//OutCome(p)
return 0;
}