c提高第五次作業

重寫結構體巢狀一級指標老師和二級指標學生的**

//結構體型別，每個導師有三個學生

typedef struct teacher

teacher;

//在createteacher中分配空間

int createteacher(teacher **p/*out*/, int n1, int n2);

//給成員賦值

void initteacher(teacher *p, int n1, int n2);

//列印結構體成員資訊

void printteacher(teacher *p, int n1, int n2);

//根據導師名字排序, 降序

void sortteacher(teacher *p, int n);

//釋放空間，在函式內部把p賦值為null

void freeteacher(teacher **p, int n1, int n2);

int main(void)

initteacher(p, n1, n2); //給成員賦值

//列印成員，排序前

printf("排序前：\n");

printteacher(p, n1, n2);

//根據導師名字排序, 降序

sortteacher(p, n1);

//列印成員，排序後

printf("\n排序後：\n");

printteacher(p, n1, n2);

//釋放空間，在函式內部把p賦值為null

freeteacher(&p, n1, n2);

return 0;

}

#pragma warning(disable:4996)#include

#include
#include
typedef 
struct
teacher
teacher;
//在createteacher中分配空間
int createteacher(teacher **p/*
out*/, int n1, int
n2) 
int i = 0
; 
int j = 0
; teacher *tmp = null;//
teacher tmp[3]
tmp =(teacher*)malloc(n1 * sizeof
(teacher));
if (tmp ==null) 
for (i = 0; i < n1; i++) 
//直接賦值
tmp[i].stu =s;
}//間接賦值是指標存在的最大意義
*p =tmp;
return0;
}//給成員賦值
void initteacher(teacher *p, int n1, int
n2) 
int i = 0
; 
int j = 0
; 
char buf[30
]; 
for (i = 0; i < n1; i++) 
}}//
列印結構體成員資訊
void printteacher(teacher *p, int n1, int
n2) 
printf("\n
");}}//
根據導師名字排序, 降序
void sortteacher(teacher *p, int
n) 
int i = 0
; 
int j = 0
; teacher tmp;
for (i = 0; i < n-1; ++i) 
}}}//
釋放空間，在函式內部把p賦值為null
void freeteacher(teacher **p, int n1, int
n2) 
teacher *tmp = *p;
int i = 0
; 
int j = 0
; 
for (i = 0; i < n1; i++) 
//學生
for (j = 0; j < n2; j++) 
}if (tmp[i].stu !=null) 
}if (tmp !=null) 
}int main(void
) initteacher(p, n1, n2); 
//給成員賦值
//列印成員，排序前
printf("
排序前：\n");
printteacher(p, n1, n2);
//根據導師名字排序, 降序
sortteacher(p, n1);
//列印成員，排序後
printf("
\n排序後：\n");
printteacher(p, n1, n2);
//釋放空間，在函式內部把p賦值為null
freeteacher(&p, n1, n2);
return0;
}

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