用C语言开发小型数据库管理系统代码

void SaveFile(int i,FILE *fp1){ (文本方式)数据写到文件中
int j;
for(j=1;j<i+1;j++)
fprintf(fp1,"%s,%ld,%d,%d,%d",record[j].name,record[j].Number,record[j].Math,record[j].C,record[j].Amount);
printf("\t\t\t\t* 排序菜单 *\n");
printf("\t\t\t\t* 1. 数学成绩排序 *\n");
printf("\t\t\t\t* 2. C语言成绩排序 *\n");
printf("\t\t\t\t* 3. 总分排序 *\n");
printf("\n\t\t\t\t* * * * * * * * * * * *\n");
printf("\t\t\t\t* 删除菜单 *\n");
printf("\t\t\t\t* 1. 学号查询删除 *\n");
printf("\t\t\t\t* 2. 返回到上级菜单 *\n");
char name[10];
long Number;
int Math;
int C;
int Amount;
}st;
st record[8];
count num[1];
char filename[10]={"0"};
char filename2ቤተ መጻሕፍቲ ባይዱ10]={"0"};
printf("\t\t\t\t* 1. 创建新文件 *\n");
printf("\t\t\t\t* 2. 添加记录 *\n");
printf("\t\t\t\t* 3. 删除记录 *\n");
printf("\t\t\t\t* 4. 排序 *\n");
scanf("%ld",&record[i].Number);
if(i!=1)
for(j=1;j<i;j++)
if(record[i].Number==record[j].Number)
{printf("\n\t警告! 输入了二个同样的学号! 第%d条和第%d学号相同!\n",i,j);
printf("\n\t请重新输入!\n");
goto Loop1;
}
printf("\t\t\t\t* 5. 查询记录 *\n");
printf("\t\t\t\t* 6. 退出 *\n");
printf("\t\t\t\t* * * * * * * * * *\n");
}
void DelMenu(){ /*删除菜单*/
#include <stdio.h>
#include <string.h>
typedef struct count{ /*保存记录条数结构体*/
char name[10];
int num;
}count;
typedef struct st{
}
*/
void ReadComputer2(int i,FILE *fp1){ /*(2方式)数据写入机器*/
int j;
for(j=1;j<i+1;j++)
if((fread(&record[j],sizeof(struct st),1,fp1))!=1)
if((ch=getchar())=='s')
i=i-1;
}
return(i);
}
/*
void ReadComputer(int i,FILE *fp1){ (文本方式)数据写入机器
int Inputnum[8];
void MainMenu(){ /*主菜单*/
printf("\n\t\t\t\t* * * * * * * * * *\n");
printf("\t\t\t\t* 主菜单 *\n");
printf("\t\t\t\t* * * * * * * * * * * *\n");
}
void RankingMenu(){ /*排序菜单*/
printf("\n\t\t\t\t* * * * * * * * * * * *\n");
goto Loop3;
}
record[i].Amount=record[i].Math+record[i].C;
printf(" \n'w'=结束录入 's'=重新录入此条记录 'n'=下一条 : ");
getchar(); /*吃掉上一个回车符*/
printf("\t\t\t\t* * * * * * * * * * * *\n");
}
char Inputfilename(){ /*输入文件名同时产生付本文件名*/
char str2[]={"B"};
{printf("\n主文件数据读取错误! \n");
fclose(fp1);
}
}
void SaveFile2(int i,FILE *fp1){ /*(2方式)数据写到文件中*/
printf("** 请输入文件名 ** : ");
scanf("%s",filename);
getchar();
strcpy(filename2,filename);
strcat(filename2,str2);
}
FILE *readfile(){ /*读取文档*/
int j;
for(j=1;j<i+1;j++)
if((fwrite(&record[j],sizeof(struct st),1,fp1))!=1)
{printf("\n主文件数据写入错误! \n");
fclose(fp1);
}
}
FILE *fp1;
if((fp1=fopen(filename,"ab"))==NULL)
{printf("\n文件追加错误!!\n");
fclose(fp1);
}
return(fp1);
}
int InputSave(){ /*添加数据 */
/* ************************************************************ *********************************************************** */
int i=0,j;
char ch='y';
while(ch!='w')
{i=i+1;
printf("\n** 请输入姓名(字符型) ** :");
scanf("%s",record[i].name);
Loop1: printf("\n** 请输入学号(长整型) ** :");
Loop2: printf("\n** 请输入数学成绩(整型) ** :");
scanf("%d",&record[i].Math);
if(record[i].Math>100||record[i].Math<0)
{printf("\n\t输入的分数不服合实际要求! 请重新录入!\n");
int j;
for(j=1;j<i+1;j++)
fscanf(fp1,"%s,%ld,%d,%d,%d",record[j].name,&record[j].Number,&record[j].Math,&record[j].C,&record[j].Amount);
}
printf("\t\t\t\t* 4. 返回到上级菜单 *\n");
printf("\t\t\t\t* * * * * * * * * * * *\n");
}
void InquireMenu(){ /*查讯菜单*/
goto Loop2;
}
Loop3: printf("\n** 请输入C语言成绩(整型) ** :");
scanf("%d",&record[i].C);
if(record[i].C>100||record[i].C<0)
{printf("\n\t输入的分数不服合实际要求! 请重新录入!\n");
FILE *fp1;
if((fp1=fopen(filename,"rb"))==NULL)
{printf("\n文件读取错误!!\n");