writescore.c

实现：SELECT [ALL|DISTINCT] <属性表达式>[

#include<stdio.h>
#include<stdlib.h>
#define MAXSCORE 5
struct score{
	char name[10];		//学生姓名
	int studentNo;		//学号
	char className[20]; //课程名称
	double grade;   //分数
}sco[MAXSCORE];



void main()
{
	FILE *fp;
	int i;
	//int ages,studentNos;
	//char names[10],studentNos[30];
	//char ch,filename[10];

	for(i=0;i<MAXSTUDENTNO;i++)
	{
		printf("请输入第%d个学生的成绩\n",i);
		printf("请输入学生姓名:");
		scanf("%s",sco[i].name);
		printf("\n");
		printf("请输入学号:");
		scanf("%d",&sco[i].studentNo);
		printf("\n");
		printf("请输入课程名称:");
		scanf("%s",sco[i].className);
		printf("\n");
		printf("请输入分数:");
		scanf("%f",&stu[i].grade);
		printf("\n");
		printf("\n");
	}
	if((fp=fopen(score.txt,"w"))==NULL){
		printf("Cannot open the file!\n");
		exit(0);
	}
	for(i=0;i<MAXSTUDENTNO;i++)
	{
		fwrite(&sco[i],sizeof(struct score),1,fp);
	}
	for(i=0;i<MAXSTUDENTNO;i++){
		fread(&sco[i],sizeof(struct score),1,fp);
	}
	for(i=0;i<MAXSTUDENTNO;i++){
		printf("姓名:%10s 学号:%d 课程名称:%s 分数：%f",sco[i].name,&sco[i].studentNo,&stu[i].age,stu[i].class,&stu[i].studentNo);
	}
}