#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
using namespace std;
/*
Copyright Tracy Xiao
*/
struct student
{
	char num[8];
	char name[20];
	float score;
};

void main()
{
	FILE *fp;
	fp = fopen("c:\\1.txt", "r");
	int n=0;//行数
	char buf[100];
	while (fgets(buf, 100, fp) != NULL)
		n++;
	freopen("c:\\1.txt", "r", fp);
	struct student *stu = new student[n];
	int i = 0;
	while (!feof(fp))
	{
		fscanf(fp, "%s %s %f\n", stu[i].num, stu[i].name, &(stu[i].score));
		i++;
	}
	fclose(fp);
	for (int i = 0; i < n;i++)
	printf("%s,%s,%f,\n", stu[i].num, stu[i].name, stu[i].score);

	printf("================================\n");

	for (int i = 0; i < n - 1; i++)
	{
		for (int j = 0; j < n - 1 - i; j++)
		{
			if (stu[j].score>stu[j + 1].score)
			{
				student tmp = stu[j];
				stu[j] = stu[j + 1];
				stu[j + 1] = tmp;
			}
		}
	}

	for (int i = 0; i < n; i++)
		printf("%s,%s,%f,\n", stu[i].num, stu[i].name, stu[i].score);

	/*
		写入新文件:2.txt
	*/
	FILE *p = fopen("c:\\2.txt", "a");
	for (int i = 0; i < n; i++)
	{
		fprintf(p, "%s %s %f", stu[i].num, stu[i].name, stu[i].score);
		fprintf(p, "\n");
	}


	system("pause");
}