关于C++结构体的问题(新手)

Question

结构体清零有什么函数可以用么？还有用引用来调用。。如题

Answer 1

 #include <stdlib.h>
#include <stdio.h>

typedef struct {
    char name[20];
    int math;
    int eng;
    int db;
} Student;

void SetZero(Student& s)
{
    s.math = 0;
    s.eng = 0;
    s.db = 0;
}

Student* SetZero1(Student s)
{
    Student *p = (Student *)malloc(sizeof(Student));
    memcpy(p, &s, sizeof(Student));
    p->math = 0;
    p->eng = 0;
    p->db = 0;
    return p;
}

int main()
{
    Student s;
    s.math = 100;
    printf("%d\n", s.math);
    SetZero(s);
    printf("%d\n", s.math);
    s.math = 100;
    printf("%d\n", s.math);
    s = *SetZero1(s);
    printf("%d\n", s.math);
    return 0;
}

100
0
100
0