Question

c语言 怎么把全局变量变成局部变量

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

struct student_s {
char* name;
int age;
struct student_s* next;
} student;
struct student_s anotherStudent;

void printOneStudent(struct student_s student)
{
printf("%s (%d)\n", student.name, student.age);
}
void printStudents(const struct student_s* student)
{
while (student != NULL) {
printOneStudent(*student);
student = student->next;
}
}
int main(void)
{
student.name = "Xiaofeng Lin";
student.age = 50;
student.next = &anotherStudent;

anotherStudent.name = "Jingwu Xiao";
anotherStudent.age = 21;
anotherStudent.next = NULL;

printStudents(&student);
return EXIT_SUCCESS;
}
我想把student 和anotherStudent变成main()里的局部变量，怎么变？student.name要变吗？void printStudents(const struct student_s* student) 还需要写吗？

Answer 1

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

struct student_s {
char* name;
int age;
struct student_s* next;
};
void printOneStudent(struct student_s student)
{
printf("%s (%d)\n", student.name, student.age);
}
void printStudents(const struct student_s* student)
{
while (student != NULL) {
printOneStudent(*student);
student = student->next;
}
}
int main(void)
{
struct student_s student,anotherStudent;
student.name = "Xiaofeng Lin";
student.age = 50;
student.next = &anotherStudent;

anotherStudent.name = "Jingwu Xiao";
anotherStudent.age = 21;
anotherStudent.next = NULL;

printStudents(&student);
return EXIT_SUCCESS;
}