用C语言开发小型数据库管理系统代码文库样本

用C语言开发小型数据库管理系统代码的文库.txt如果有来生, 要做一棵树, 站成永恒, 没有悲伤的姿势。一半在土里安详, 一半在风里飞扬, 一半洒落阴凉, 一半沐浴阳光, 非常沉默非常骄傲, 从不依靠从不寻找。#include

#include

typedef struct count{ /*保存记录条数结构体*/

char name[10];

int num;

}count;

typedef struct st{

char name[10];

long Number;

int Math;

int C;

int Amount;

}st;

st record[8];

count num[1];

char filename[10]={"0"};

char filename2[10]={"0"};

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* 1. 创立新文件*\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");

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*/

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");

printf("\t\t\t\t* * * * * * * * * * * *\n");

}

void RankingMenu(){ /*排序菜单*/

printf("\n\t\t\t\t* * * * * * * * * * * *\n");

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("\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*/

printf("\n\t\t\t\t* * * * * * * * * * * *\n");

printf("\t\t\t\t* 查讯菜单*\n");

printf("\t\t\t\t* 1. 学号查讯*\n");

printf("\t\t\t\t* 2. 姓名查讯*\n");

printf("\t\t\t\t* 3. 数学成绩查讯*\n");

printf("\t\t\t\t* 4. C语言成绩查讯*\n");

printf("\t\t\t\t* 5. 总分查讯*\n");

printf("\t\t\t\t* 6. 返回到上级菜单*\n");

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("** 请输入文件名** : ");

scanf("%s",filename);

getchar();

strcpy(filename2,filename);

strcat(filename2,str2);

}

FILE *readfile(){ /*读取文档*/

FILE *fp1;

if((fp1=fopen(filename,"rb"))==NULL)

{printf("\n文件读取错误!!\n");

fclose(fp1);

}

return(fp1);

}

FILE *foundfile(){ /*新建文档*/

FILE *fp1;

if((fp1=fopen(filename,"wb"))==NULL)

{printf("\n文件创立错误!!\n");

fclose(fp1);

}

return(fp1);

}

FILE *savefile(){ /*追加文档*/

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) ** :");

scanf("%ld",&record[i].Number);

if(i!=1)

for(j=1;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;

}

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");

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");

goto Loop3;