c-使用箭头运算符来计算一个结构的3个成员的平均值，需要将点运算符转换为箭头运算符

Question

我正在练习c，我刚刚学会了如何分配整数和创建结构，我遇到了箭头运算符，我不知道如何应用它，我研究了一点，现在我知道a->b与(*a(.b相同，该箭头用于指针，我的问题是如何将此代码转换为使用箭头运算符，我尝试将成员从int更改为int*，但仍然不起作用。

#include <stdio.h>
#include <string.h>
struct student {
char name[10];
int chem_marks;
int maths_marks;
int phy_marks;
};
int main()
{
struct student ahmad;
struct student ali;
struct student abu_abbas;
strcpy (ahmad.name,"ahmad");
ahmad.chem_marks=25;
ahmad.maths_marks=50;
ahmad.phy_marks=90;
strcpy (ali.name,"ali");
ali.chem_marks=29;
ali.maths_marks=90;
ali.phy_marks=13;
strcpy (abu_abbas.name,"abu");
abu_abbas.chem_marks=50;
abu_abbas.maths_marks=12;
abu_abbas.phy_marks=80;
int ahmadavg=(ahmad.chem_marks+ahmad.maths_marks+ahmad.phy_marks)/3;
int aliavg=(ali.chem_marks+ali.maths_marks+ali.phy_marks)/3;
int abu_abbasavg=(abu_abbas.chem_marks+abu_abbas.maths_marks+abu_abbas.phy_marks)/3;

printf("%s  ",ahmad.name);
printf("average:%dn",ahmadavg);
printf("%s ",ali.name);
printf("average:%dn",aliavg);
printf("%s ",abu_abbas.name);;
printf("average:%dn",abu_abbasavg);

}

Answer 1

这不是关于结构的成员是否是指针，而是关于有一个结构与一个指向结构的指针。

这个小例子应该很清楚：

#include <stdio.h>
struct Foo
{
int a;
int b;
};
int main()
{
struct Foo f = {1,2};    // f is a structre
struct Foo* pf;          // pf is a pointer to a struct Foo
// it points nowhere
pf = &f;                 // now pf points to f
printf("%d %dn", f.a, f.b);         // direct access to f
printf("%d %dn", pf->a, pf->b);     // access via a pointer
printf("%d %dn", (*pf).a, (*pf).b); // access via a pointer (same as line above)
}