#include<stdio.h>
#define N 100
int main()
{
    int  score[N] ,i,grade,n,sum=0,max,min,x=0,y=0;
    double ave;
    printf("请输入学生的个数");
    scanf("%d",&n);
    printf("输入成绩：\n");
    scanf("%d",&grade);
    score[0]=grade;
    sum+=grade;
    max=score[0];
    min=score[0];
    for(i=1;i<n;i++)
    {
        printf("输入成绩：\n");
        scanf("%d",&grade);
        score[i]=grade;
        sum+=grade;
        if(score[i]>max)
        {
            max=score[i];
            x=i;
        }
        if(score[i]<min)
        {
            min=score[i];
            y=i;
        }        
    }
    ave=(double)sum/n;
    printf("平均数为%.2f，最高分为%d,是第%d个",ave,max,x+1); 
    for(i=x+1;i<n;i++)
    {
        if(score[i]==max)
        printf(",第%d个 ",i+1);
    }
    printf("\n最低分为%d,是第%d个",min,y+1); 
    for(i=y+1;i<n;i++)
    {
        if(score[i]==min)
        printf(",第%d个 ",i+1);
    }
    printf("\n输入一个查询的成绩：\n");
    scanf("%d",&grade);
    for(i=0;i<n;i++)
    {
        if(score[i]==grade)
        {
            printf(" 第%d个 ",i+1);
        }
    }
    return 0;
}

#include<stdio.h>
#define N 11
int main()
{
    int numbers[N]={1,2,3,4,5,6,7,8,9,10},number,i,n,a=1;
    printf("请输入想插入的数。\n");
    scanf("%d",&number);
    for(i=0;i<N-1;i++)
    {
        if(number<=numbers[i])
        {
            a=0;
            for(n=N-2;n>=i;n--)
            {
                numbers[n+1]=numbers[n];
            }
            numbers[i]=number;
            break;
        }
    } 
    if(a)
    {
        numbers[N-1]=number;
    }
    for(i=0;i<N;i++)
    {
        printf(" %d",numbers[i]);
    }
    return 0;
}

#include<stdio.h>
int main()
{
    int a,b,c,gen[10]={6,2,5,5,4,5,6,3,7,6};
    for(a=0;a<=9;a++)
     for(b=0;b<=9;b++)
       {
             c=a+b;
             if(c>9)
             break;
             if(gen[a]+gen[b]+gen[c]==12&&a+b==c&&a!=b)
        {
            printf("%d+%d=%d\n",a,b,c);
        }
       }
     return 0;
}