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#include<stdio.h> //编译预处理命令
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#include<stdlib.h> //定义杂项函数及内存分配函数
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#include<string.h> //字符串处理
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#include <time.h> //用到了time函数
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int main()
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{
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int num=0;
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while(1)
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{
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system("cls");
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load();
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printf("|----歌唱比赛管理系统----\n");
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printf("\n ----------------------\n");
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printf("| [1] 参赛歌手信息录入 |\n");
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printf("| [2] 参赛歌手信息显示 |\n");
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printf("| [3] 查询参赛歌手信息 |\n");
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printf("| [4] 修改评委打分 |\n");
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printf("| [5] 查询出场次序 |\n");
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printf("| [6] 比赛结果排序 |\n");
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printf("| [7] 退出系统 |\n");
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printf(" ----------------------\n");
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printf("请选择要进行的操作:");
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scanf("%d",&num);
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switch(num)//菜单
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{
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case 1 : info_sign();break;//录入
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case 2 : info_show();break;//显示
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case 3 : info_find();break;//查找
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case 4 : grade_modify();break;//修改
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case 5 : find_order();break;
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case 6 : result_sort();break;
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case 7 : exit(0);
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}
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}
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}
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struct node{
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int id;//编号
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char name[20];//姓名
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double score[11];//成绩
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double sum;//平均分
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}st[100],s;
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int snum=0;
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int load() /********************************************加载文件数据到内存 *************************************/
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{
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snum=0;
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FILE *fp; //声明文件指针
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fp=fopen("info.txt","r"); //以读的方式打开文件
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if(fp==NULL)
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{
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printf("数据文件加载失败，疑似info.dat文件丢失，或者未导入数据\n");
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}
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else{
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while(!feof(fp)){//遍历 文件数据
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fread(&st[snum++],sizeof(struct node),1,fp); //snum是参赛选手的数量，每读取一条数据加一次。
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}
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}
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if(snum>0)
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snum--;
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else snum=0;
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fclose(fp);
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printf("数据条数：%d\n",snum);
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return 0;
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}
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int save() /**********************************将内存数据写入文件******************************************/
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{
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FILE *fp;
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int i,t=0;
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fp=fopen("info.txt","w");//以写的方式打开参赛选手信息文件
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for(i=0;i<snum;i++){
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fwrite(&st[i],sizeof(struct node),1,fp);
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//依次将数据读入st结构体
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}
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fclose(fp);
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printf("保存成功!\n");
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//printf("%d\n",snum);//输出保存后的参赛选手数目，和课程数目
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return 0;
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}
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int info_sign() /*************************添加参赛选手信息 *********************/
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{
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printf("数据条数：%d\n",snum);
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int i;
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printf("编号:");
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scanf("%d",&st[snum].id);
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printf("姓名:");
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scanf("%s",st[snum].name);
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printf("依次输入十位评委成绩:\n");
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st[snum].sum=0;
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double mi=0xffffff,ma=0;
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for( i=0;i<10;i++)
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{
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scanf("%lf",&st[snum].score[i]);
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if(mi>st[snum].score[i])
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{
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mi=st[snum].score[i];
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}
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if(ma<st[snum].score[i])
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{
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ma=st[snum].score[i];
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}
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st[snum].sum+=st[snum].score[i];
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}
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st[snum].sum=st[snum].sum-mi-ma;
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st[snum].sum/=8;//求平均分
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snum++;
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save();//由于结构体里的数据有新的添加 ，所有这里调用一下保存函数
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getchar();getchar();
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}
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