#include<stdio.h>
int main()
{
    int a[10]={4,7,9,4,45,65,74,89,90};
    int i,b,c;
    printf("Please input your number :");
    scanf("%d",b);
    if(b>a[8])
        a[9]=b;
    else
        {
            for(i=0;i<9;i++)
            {
            if(b<a[i])
            {
                for(c=8;c<=i;c--)
                {
                    a[c+1]=a[c];

                }
                a[i]=b;
                break;
            }
            }
        }
    for(i=0;i<10;i++)
        printf("%d",a[i]);
    return 0;
}

#include<stdio.h>
int main()
{
    int a[10]={4,7,9,10,45,65,74,89,90};
    int i,b,c;
    printf("Please input your number :");
    scanf("%d",b);
    if(b>a[8])
        a[9]=b;
    else
        {
            for(i=0;i<9;i++)
            {
            if(b<a[i])
            {
                for(c=8;c<=i;c--)
                {
                    a[c+1]=a[c];

                }
                a[i]=b;
                break;
            }
            }
        }
    for(i=0;i<10;i++)
        printf("%d",a[i]);
    return 0;
}

scanf("%d",&b);

谢谢谢谢