【 结构体 】详解

   在不使用结构体的情况下：我们自然而然想到使用数组进行分别存储“身高”和“姓名”，然后进行sort排序。	代码如下：

#include<stdio.h>
#include<ctype.h>

#define NUM 4      //学生人数
#define NAME_LEN 64//名字最大字符数

void swap_highth(int* num1, int* num2)
{
	int tmp = *num1;
	*num1 = *num2;
	*num2 = tmp;
}
void swap_str(char* a, char* b)
{
	char tmp[NAME_LEN] = { 0 };
	strcpy(tmp, a);
	strcpy(a, b);
	strcpy(b, tmp);
}
void sort(char name[][NAME_LEN], int highth[])
{
	int i = 0, j = 0;
	for (i = 0; i < NUM-1; i++)
	{
		for (j = 0; j <NUM-1-i; j++)
		{
			if (highth[j-1] > highth[j])
			{
				swap_highth(&highth[j-1], &highth[j ]);
				swap_str(name[j-1], name[j ]);
			}
		}
	}
}
int main()
{
	char name[][NAME_LEN] = {"liming" ,"zhangsan", "lisi" , "wangwu"};
	int highth[] = {170,175,168,180};

	for (int i = 0; i < NUM; i++)
	{
		printf("%s: %d \n", name[i], highth[i]);
	}

	sort(name, highth);
	puts("按身高排序:\n");
	for (int i = 0; i < NUM; i++)
	{
		printf("%s: %d \n", name[i], highth[i]);
	}

	return 0;
}

#include<stdio.h>

#define NUM 4
#define NAME_LEN 64
struct stu
{
	char name[NAME_LEN];
	int highth;
	int score;
};
void swap(struct stu* num1, struct stu* num2)
{
	struct stu tmp = *num1;
	*num1 = *num2;
	*num2 = tmp;
}
void sort(struct stu arr[], int n)
{
	int i = 0, j = 0;
	for (i = 0; i < n - 1; i++)
	{
		for (j = 0; j < n - 1 - i; j++)
		{
			if (arr[j - 1].highth > arr[j].highth)
			{
				swap(&arr[j - 1], &arr[j]);
			}
		}
	}
}
int main()
{
	struct stu arr[] = { 
		                 {"liming",170,50},
	                     { "zhansan",175,60 },
	                     { "lisi",168,100 },
	                     { "wangwu",180,80 } 
	                   };

	int i = 0;
	for (i = 0; i < NUM; i++)
	{
		printf("%s: %d ___%d\n", arr[i].name,arr[i].highth,arr[i].score);
	}

	sort(arr, NUM);
	puts("按身高排序后\n");
	for (i = 0; i < NUM; i++)
	{
		printf("%s: %d ___%d\n", arr[i].name, arr[i].highth, arr[i].score);
	}
	return 0;
}