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Copy path职工管理系统C.cpp
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职工管理系统C.cpp
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#include <windows.h>
#include <iostream>
#include <mysql.h>
#include <iomanip>
#include <cstring>
#include <conio.h>
#include <cstdio>
#include <ctime>
using namespace std;
char column[20][30]; //存储属性名称
FILE *fplog;
char info[10][50]; //临时存放当前键入的属性值
MYSQL mysql, *sock; //mysql连接
MYSQL_RES *res; //这个结构代表返回行的一个查询结果集
int num_fields; //结果集中的列数
char query[1024]; //查询语句
char tableName[20]; //表名
bool QueryDatabase(const char*s=0,int show=1,const char* todo="select * ");
bool ConnectDatabase();
void printDateTime(FILE * fp);
void DB(const char* tb = "worker");
void close();
void Choose();
void Add();
void Delete();
void Search();
void Modify();
void Sort();
void ShowAll();
int main() {
DB("workers");
ShowAll();
Choose();
close();
return 0;
}
void Choose() {
char c;
while(c!='0') {
cout<<setfill('*')<<setw(80)<<"*"<<endl;
cout<<"1.增加\n2.删除\n3.查找\n4.修改\n5.排序\n6.显示所有\n0.退出"<<endl;
cout<<setfill('*')<<setw(80)<<"*"<<endl<<"请选择: ";
do {
c=getche();
cout<<"\r\t\t\t\r"<<c<<":";
switch(c) {
case '1':
Add();
break;
case '2':
Delete();
break;
case '3':
Search();
break;
case '4':
Modify();
break;
case '5':
Sort();
break;
case '6':
ShowAll();
break;
case '0':
break;
default:
cout<<"\r输入错误，请重新输入: \b\b";
}
} while(c<'0' || c>'6');
cout<<endl;
fclose(fplog);
fplog = fopen("log.txt","a+");
}
}
void Add() {
sprintf(query, "insert into %s values ('",tableName);
cout<<"请输入 "<<column[0]<<": ";
cin>>info[0];
strcat(query,info[0]);
for(int i=1; i<num_fields; i++) {
cout<<"请输入 "<<column[i]<<": ";
cin>>info[i];
strcat(query,"','");
strcat(query,info[i]);
}
strcat(query,"')");
printDateTime(fplog);
if(mysql_query(sock, query)) { //执行SQL语句
printf("添加失败 (%s)\n",mysql_error(sock));
fprintf(fplog,"Error: %s (%s)\n",query,mysql_error(sock)); //增加日志
} else {
puts("添加成功");
fprintf(fplog,"%s\n",query); //增加日志
}
}
void Delete() {
char temp[128];
cout<<"请输入需要删除的"<<column[0]<<": ";
cin>>info[0];
sprintf(temp,"where %s='%s'",column[0],info[0]);
if(QueryDatabase(temp)) { //执行SQL语句
cout<<"确定删除该元组？(1或y确认):";
char c=getch();
if(c=='1' || c=='y' || c=='Y') {
printDateTime(fplog);
if(QueryDatabase(temp,1,"delete")) {
puts("删除成功");
fprintf(fplog,"%s\n",query); //增加日志
} else {
printf("删除失败 (%s)\n",mysql_error(sock));
fprintf(fplog,"Error: %s (%s)\n",query,mysql_error(sock)); //增加日志
}
} else
cout<<"已取消删除"<<endl;
} else {
printDateTime(fplog);
puts("删除失败 (该元组不存在)");
fprintf(fplog,"Error: %s : 该元组不存在\n",query); //增加日志
}
}
void Search() {
cout<<"请选择查找方式:\n";
for(int i=0; i<num_fields; i++)
cout<<i+1<<"."<<column[i]<<" ";
char c=getch();
if(c>48 && c<49+num_fields) {
cout<<"\n请输入需要查找的"<<column[c-49]<<": ";
cin>>info[0];
char temp[128];
sprintf(temp,"where %s='",column[c-49]);
strcat(temp,info[0]);
strcat(temp,"'");
QueryDatabase(temp);
}
}
void Modify() {
cout<<"请选择需要修改的限制属性:\n";
for(int i=0; i<num_fields; i++)
cout<<i+1<<"."<<column[i]<<" ";
char c=getch();
char temp[128];
if(c>48 && c<49+num_fields) {
cout<<"\n请输入限制属性的"<<column[c-49]<<": ";
cin>>info[0];
sprintf(temp,"where %s='%s'",column[c-49],info[0]);
if(QueryDatabase(temp)) {
cout<<"请选择需要修改的属性:\n";
for(int i=0; i<num_fields; i++)
cout<<i+1<<"."<<column[i]<<" ";
char c=getch();
if(c>48 && c<49+num_fields) {
cout<<"\n请输入新的"<<column[c-49]<<": ";
cin>>info[0];
sprintf(query, "update %s set %s='%s' %s",tableName,column[c-49],info[0],temp);
printDateTime(fplog);
if(mysql_query(sock, query)) { //执行SQL语句
printf("修改失败 (%s)\n",mysql_error(sock));
fprintf(fplog,"Error: %s (%s)\n",query,mysql_error(sock)); //增加日志
} else {
puts("修改成功");
fprintf(fplog,"%s\n",query); //增加日志
}
}
} else
cout<<"未搜索到可修改项，建议更改修改限制属性"<<endl;
}
}
void Sort() {
cout<<"请选择排序方式:\n";
for(int i=0; i<num_fields; i++)
cout<<i+1<<"."<<column[i]<<" ";
char c=getch();
if(c>48 && c<49+num_fields) {
char temp[128], way[5]="asc";
cout<<"\r以"<<column[c-49]<<"降序排序请按1或y,按q取消排序,其他键将按升序排序: ";
char c2=getch();
cout<<"\r\t\t\t\t\t\t\t\r按"<<column[c-49];
if(c2=='q' || c2=='Q') {
cout<<"\r\t\t\t\t\t\t\t\r已取消排序"<<endl;
return;
} else if(c2=='1' || c2=='y' || c2=='Y') {
strcpy(way,"desc");
cout<<"降序排序"<<endl;
} else
cout<<"升序排序"<<endl;
sprintf(temp,"order by %s %s",column[c-49],way);
if(QueryDatabase(temp)) {
printDateTime(fplog);
fprintf(fplog,"%s\n",query);
}
}
}
void ShowAll() {
QueryDatabase();
}
//连接数据库
bool ConnectDatabase() {
int result = 1;
mysql_init(&mysql); //初始化mysql，连接数据库
if (!(sock = mysql_real_connect(&mysql,"localhost", "root", 0, "test",0,NULL,0))) {
printf( "Error connecting to database:%s\n",mysql_error(&mysql));
result = 0;
} else {
printf("Connected successful\n");
mysql_query(sock,"set names 'GBK'");//设置字符集，防止中文无法正常显示
sprintf(query, "select * from %s ",tableName);
mysql_query(sock, query);
res = mysql_store_result(sock);
num_fields = mysql_num_fields(res);
//获取字段的信息
for(int i=0; i<num_fields; i++)
strcpy(column[i], mysql_fetch_field(res)->name);
puts("");
}
puts("————————————————————\n");
return result;
}
//查询数据
bool QueryDatabase(const char*s,int show,const char* todo) {
int result = 1;
sprintf(query, "%s from %s ",todo,tableName);
if(s)
strcat(query,s);
if(mysql_query(sock, query)) { //执行SQL语句
printf("Query failed (%s)\n",mysql_error(sock));
return 0;
} else if(strcmp(todo,"delete")==0)
return 1;
//获取结果集
if (!(res=mysql_store_result(sock))) { //获得sql语句结束后返回的结果集
printf("Couldn't get result from %s\n", mysql_error(sock));
return 0;
}
//打印结果数
int affect = mysql_affected_rows(sock);
if(show) {
printf(">>>共查询到 %d 组结果<<<\n",affect);
//获取字段的信息
if(affect>0) {
for(int i=0; i<num_fields; i++)
printf("%-*s",80/num_fields,column[i]);
puts("");
//打印获取的数据
MYSQL_ROW row; //一个行数据的类型安全(type-safe)的表示
while (row = mysql_fetch_row(res)) { //获取下一行
for(int i=0; i<num_fields; i++)
printf("%-*s",80/num_fields,row[i]);
puts("");
}
}
}
puts("————————————————————\n");
return affect;
}
void printDateTime(FILE * fp) {
time_t now_time=time(NULL);
struct tm *newtime=localtime(&now_time);
char tmpbuf[128];
static int first = 1;
if(first) {
strftime(tmpbuf,128,"\n******%Y/%m/%d******\n",newtime);
fprintf(fp,tmpbuf);
first = 0;
}
strftime(tmpbuf,128,"%H:%M:%S ",newtime);
fprintf(fp,tmpbuf);
}
void DB(const char*tb) {
fplog = fopen("log.txt","a+");
strcpy(tableName,tb);
if(!ConnectDatabase()) {
cout<<"数据库连接失败,请检查连接后重试！"<<endl;
system("pause");
exit(-1);
}
}
//释放资源
void close() {
mysql_free_result(res);
mysql_close(sock);
fclose(fplog);
}