12.1

#include <stdio.h>
#include<string.h>
#include <stdlib.h>
#define N 5
#define M 3

int login()
{
char secretCode[10],name[8];
int number=3;
printf("\n\n");
printf("\t\t\t******欢迎使用青歌赛评分系统******\n");
printf("\n\n");
printf("请输入用户名");
scanf("%s",name);
printf("请输入密码 :");
scanf("%s",secretCode);
while(number>0)
{
if(strcmp(secretCode,"789456123")==0&&strcmp(name,"王晓华")==0)break;
else
{
number--;
if(number<=0)break;
printf("\n\t\t\t您还有%d次机会\n",number);
printf("请输入用户名");
scanf("%s",name);
printf("请输入密码：");
scanf("%s",secretCode);
}
}
if(number>0) return 1;
else printf("\t\t\t很遗憾，欢迎改日使用\n");
return 0;
}
int main(void)
{
char name[5][8],n[8];
float a
[M],sum,t,max,min,avg
;
int i,j;
setvbuf(stdout, NULL, _IONBF, 0);
if(login()==0)return 1;
printf("\t欢迎使用青歌赛评分系统\n");
getchar();
system("cls");
for(i=0;i<M;i++)
{
sum=0;
min=120;
max=0;
printf("请输入第%d位选手的姓名：",i+1);
scanf("%s",name[i]);
for(j=0;j<N;j++)
{
printf("请输入第%d位评委的打分:",j+1);
scanf("%f",&a[i][j]);
sum+=a[i][j];
if(a[i][j]<min) min=a[i][j];
if(a[i][j]>max) max=a[i][j];
}
avg[i]=(sum-max-min)/3;
printf("第%d位选手%s的最终成绩为%.2f\n",i+1,name[i],avg[i]);
system("pause");
system("cls");
}
for(i=0;i<N-1;i++)
for(j=i+1;j<N;j++)
if(avg[j]>avg[i])
{
t=avg[j];
avg[j]=avg[i];
avg[i]=t;
strcpy(n,name[j]);
strcpy(name[j],name[i]);
strcpy(name[i],n);
}
printf("名次     姓名    分数\n");
printf("第%d位选手的最终成绩为%.2f\n",i+1,avg[i]);
return EXIT_SUCCESS;
}