数据结构（五）跨函数使用内存

跨函数使用内存

#include<stdio.h>
#include<malloc.h>
struct Student {
     int sid;
     char name[100];
     int age;
};
struct Student * CreateStudent(void);
void ShowStudent(struct Student *pst);
int main(void) {
     struct Student *ps;
     ps = CreateStudent();
     ShowStudent(ps);
     return 0;
}
struct Student * CreateStudent(void) {
     //此函数分配了内存空间，并且给结构体赋值
     struct Student *p = (struct Student *)malloc(sizeof(struct Student));
     p->sid = 99;
     p->age = 88;
     return p;
}
void ShowStudent(struct Student *pst) {
     //此函数调用了其他函数分配的值
     printf("%d %d\n",pst->sid, pst->age);
}