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138 lines
2.2 KiB
138 lines
2.2 KiB
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#include<stdio.h>
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#include<string.h>
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#include<stdlib.h>
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struct singer
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{
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char id[10];
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int rank;
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char name[10];
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int score[10];
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float mark;
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};
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int main(void)
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{
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int i,b,j,s,n,t;
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FILE *fp;
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int sum,max,min;
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struct singer a[5];
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printf(" 歌手比赛系统 \n");
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printf(" 菜单 \n");
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printf("1:输入选手编号和姓名\n");
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printf("2:评委打分\n");
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printf("3:计算平均分\n");
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printf("4:成绩排序\n");
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printf("5:写入数据文件\n");
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printf("6:查看文件数据\n");
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printf("7:退出系统\n");
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printf(" ");
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for( ; ;)
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{
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printf("输入序号选择功能");
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scanf("%d",&n);
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switch(n)
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{
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case 1:
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printf("输入选手编号和姓名\n");
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for(i=0;i<5;i++)
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{
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printf("输入%d号选手的编号和名字:",i);
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scanf("%s %s",a[i].id,a[i].name);
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}
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break;
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case 2:
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printf("评委打分\n");
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printf("最高分为100分\n");
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for(i=0;i<5;i++)
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{
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printf("评委给%d号歌手打分:\n",i);
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for(j=0;j<5;j++)
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{
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printf("%d号评委给歌手打分:",j);
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scanf("%d",&a[i].score[j]);
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}
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}
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break;
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case 3:
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for(i=0;i<5;i++)
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{
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max=a[i].score[0];
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min=a[i].score[0];
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sum=0;
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for(j=0;j<5;j++)
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{
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sum=sum+a[i].score[j];
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if(a[i].score[j]>max)
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{
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max=a[i].score[j];
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}
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if(a[i].score[j]<min)
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{
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min=a[i].score[j];
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}
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}
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printf("%d号歌手的平均分",i);
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a[i].mark=(sum-min-max)/3.0;
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printf("%f\n",a[i].mark);
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}
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break;
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case 4:
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for(i=0;i<=n;i++)
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{
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s=0;
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for(j=0;j<=n;j++)
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{
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if(a[i].mark<a[j].mark)
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s++;
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}
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a[i].rank=s;
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}
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for(i=0;i<=n;i++)
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{
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for(j=0;j<=n;j++)
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{
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if(i==a[j].rank)
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printf("%s是第%d 得分为%.2f\n",a[j].name,i,a[j].mark);
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}
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printf("\n");
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}
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break;
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case 5:
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if((fp=fopen("singer.txt","w"))==NULL)
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{
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printf("cann't open file");
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}
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for(i=0;i<5;i++)
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{
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fwrite(&a[i],sizeof(struct singer),1,fp);
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}
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fclose(fp);
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printf("保存成功\n");
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break;
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case 6:
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if((fp=fopen("singer.txt","rb"))==NULL)
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{
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printf("cann't open file");
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}
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for(i=0;i<5;i++)
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{
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fscanf(fp,"%s %s %f",a[i].id,a[i].name,&a[i].mark);
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printf("%s %s %f\n",a[i].id,a[i].name,&a[i].mark);
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}
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break;
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case 7:
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exit(0);
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}
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}
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return 0;
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}
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