#include <stdio.h>

int mian ()
{
    int i, j, t, a[10];
    printf ("input 10 number: \n");
    for (i = 0;i < 10; i++)
    {
        scanf ("%d", &a[i]);
    }
    printf ("\n");
    for (j = 0; j < 9 ; j++)
    {
        for (i = 0 ; i < 9 - j; i++)
        {
            if (a [i] >a [a+1] )
            {
                t = a[i];    a[i] = a[i+1];    a[i+1] = t;
            }
        }
        printf ("the sorted number: \n");
    }
    printf ("\n");
    return 0;
   
}





——————————————————————————————————————————————
--------------------Configuration: 1 - Win32 Debug--------------------
Compiling...
1.c
C:\Windows\System32\1.c(16) : error C2107: illegal index, indirection not allowed
C:\Windows\System32\1.c(16) : warning C4047: '>' : 'int ' differs in levels of indirection from 'int *'
Error executing cl.exe.

1.obj - 1 error(s), 1 warning(s)

if (a [i] >a [a+1] )

其实，编译器已经告诉你问题在第16行，自己去看一看，应该能看出问题。要学会看编译信息才行呀，小弟！

幸亏版主没骂，光标轻轻一点转到错误行，仔细找代码，眼睛大的话找GOGEL翻译下错误就明白了！