insert.c

学生管理系统c

#include <stdio.h>
#include "h.h"
void insert()
{
	FILE *fp1;
	char c='b';
	/*输入一份数据*/
		printf("\tNO.:");/*学号*/
		scanf("%s",s.num);
		if((fp=fopen("student.dat","r"))==0)
		{
			fp=fopen("student.dat","w");
		}
		for(i=0;fread(&st[i],LEN,1,fp)!=0;i++);    /*计算i值*/
		n=i;
		for(i=0;i<n;i++)
		{
			if(strcmp(s.num,st[i].num)==0)
			{
				printf("please input again!");
				printf("\n\tNO.:");
				scanf("%s",s.num);
			}
		}
		printf("\tName:");/*姓名*/
		scanf("%s",s.name);
		printf("\tSex(boy/girl):");/*性别*/
		scanf("%s",s.sex);
		while(strcmp(s.sex,"boy")!=0&&strcmp(s.sex,"girl")!=0)
		{
			printf("please input again!\n\tSex(boy/girl):");
			scanf("%s",s.sex);
		}
		for(j=0;j<K;j++)/*各科成绩*/
		{
			printf("\tScore%d:",j+1);
			scanf("%d",&s.score[j]);
			while(s.score[j]<0||s.score[j]>100)
			{
			printf("please input again!\n\tScore%d:",j+1);
			getchar();
			scanf("%d",&s.score[j]);
			}
			
		}
		s.ave=0;/*平均成绩*/
		for(j=0;j<K;j++)
			s.ave+=s.score[j];
		s.ave=s.ave/K;
		/*从文件读取数据*/
		if((fp=fopen("student.dat","r"))==0)
		{
			fp=fopen("student.dat","w");
		}
		for(i=0;fread(&st[i],LEN,1,fp)!=0;i++);    /*计算i值*/
		n=i;
		for(t=0;st[t].num>s.num&&t<n;t++);    /*计算t值*/
		/*向文件输出数据*/
		fp1=fopen("student.dat","wb");
		for(i=0;i<t;i++)
		{
			fwrite(&st[i],LEN,1,fp1);
		}
		fwrite(&s,LEN,1,fp1);
		for(i=t;i<n;i++)
		{
			fwrite(&st[i],LEN,1,fp1);
		}

		fclose(fp);
		fclose(fp1);
	printf("\n");
	printf("do you want enter the menu?(y/n)\n\ty--return menu\n\tn--continue:");
	getchar();
	scanf("%c",&c);
	if(c=='y'||c=='Y')
		main();
	if(c=='n'||c=='N')
		insert();
}