学生信息管理系统

//按学生成绩进行排序
# include 
# include 
struct Student
{
	int age;
	float score;
	char name[100];
};
int main(void)
{
	int len;
	struct Student * pArr;
	int i, j;
	struct Student t;
	//动态的构造一维数组
	printf("请输入学生的个数:\n");
	printf("len = ");
	scanf("%d", &len);
	pArr = (struct Student *)malloc(len * sizeof(struct Student));
	//输入
	for (i=0; i<len; ++i)
	{
		printf("请输入第%d个学生的信息:\n", i+1);
		printf("age = ");
		scanf("%d", &pArr[i].age);
		printf("name = ");
		scanf("%s", pArr[i].name);  //name是数组名,本身就已经是数组首元素的地址, 所以pArr[i].name 不能改成 &pArr[i].name

		printf("score = ");
		scanf("%f", &pArr[i].score);
	}

	//按学生成绩升序排序 冒泡算法
	for (i=0; i<len-1; ++i)
	{
		for (j=0; j<len-1-i; ++j)
		{
			if (pArr[j].score > pArr[j+1].score) //>升序 <降序
			{
				t = pArr[j];
				pArr[j] = pArr[j+1];
				pArr[j+1] = t;
			}
		}
	}

	printf("\n\n学生的信息是:\n");
	//输出
	for (i=0; i<len; ++i)
	{
		printf("第%d个学生的信息是:\n", i+1);
		printf("age = %d\n", pArr[i].age);
		printf("name = %s\n", pArr[i].name);  //name是数组名,本身就已经是数组首元素的地址,
		                                   // 所以pArr[i].name 不能改成 &pArr[i].name
		printf("score = %f\n", pArr[i].score);
	
		printf("\n");
	}
	return 0;
}


你可能感兴趣的:(C语言笔记)