请帮找下程序的错误，这个程序是把三个数按从大到小排列并打印出来，我设计了一个指针函数，目的是换输入的三个数的顺序，但函数编的有问题，请高手帮忙指导一下：
#include <stdio.h>
main()
{
    void change(int *p_a,int *p_b,int *p_c);
    int a,b,c;
    int *p_a,*p_b,*p_c;
    p_a=&a;p_b=&b;p_c=&c;
    scanf("%d,%d,%d",&a,&b,&c);
    change(p_a,p_b,p_c);
    printf("%d,%d,%d",a,b,c);
    getch();
}

void change(int *p_a,int *p_b,int *p_c)
{
    int temp;   
    if(*p_a<*p_b) {temp=*p_a;*p_a=*p_b;*p_b=temp;}
    if(*p_b<*p_c) {temp=*p_b;*p_b=*p_c;*p_c=temp;}
    if(*p_a<*p_c) {temp=*p_a;*p_a=*p_c;*p_c=temp;}

}

#include <stdio.h>
#include <conio.h>

void change(int *p_a,int *p_b,int *p_c);

int main(void)     // c标准
{
   
    int a, b, c;
   
    int *pa, *pb, *pc;
   
    pa = &a;
    pb = &b;
    pc = &c;
   
    scanf("%d, %d, %d", pa, pb, pc);
    change(pa, pb, pc);
    printf("%d,%d,%d", a, b, c);
   
    getch();
    return 0;
}

void change(int *pa, int *pb, int *pc)
{
    int temp;       // 1, 2, 3
    if(*pa < *pb)
    {
        temp = *pa;
        *pa = *pb;
        *pb = temp;
    }                 // 2, 1, 3
        
    if(*pb < *pc)
    {
        temp = *pb;
        *pb  = *pc;
        *pc  = temp;
    }                 // 2, 3, 1  
   
    if(*pa < *pb)  //  这里应该比较 a 和b
    {
        temp = *pa;
        *pa  = *pb;
        *pb  = temp;
    }                 // 3, 2, 1

}

if(*pa < *pb)  //  这里应该比较 a 和b
    {
        temp = *pa;
        *pa  = *pb;
        *pb  = temp;
    }
了解，多谢指导，太感谢了……
还有一点 main后的括号里加void是什么意思？

Complete Code for the Main Form
The following is the complete code for the main form of the JumpStart application.

Xml Copy Code
Private Sub cmdBrowse_Click()
    CommonDialog1.ShowOpen
    txtFilePath.Text = CommonDialog1.FileName
End Sub

Private Sub cmdExit_Click()
    End
End Sub

Private Sub cmdParse_Click()
    Dim reader As New SAXXMLReader360             'Reads the XML document
    Dim contentHandler As New ContentHandlerImpl 'Receives parsing events
    Dim errorHandler As New ErrorHandlerImpl     'Receive error events
    Dim dtdHandler As New DTDHandlerImpl
    rtfOutput.Text = ""
    Set reader.contentHandler = contentHandler   'They work together
    Set reader.errorHandler = errorHandler       'They also work together
    Set reader.dtdHandler = dtdHandler
    On Error GoTo 10
    reader.parseURL (txtFilePath.Text)           'Parse the document

    Exit Sub                                     'That's all, folks!

10: rtfOutput.Text = rtfOutput.Text & "*** Error *** " & Err.Number _
      & " : " & Err.Description
End Sub

Private Sub Form_Load()
    Dim fso As New FileSystemObject
    Dim folder As folder
    Dim strSampleFilePath As String
   
    Set folder = fso.GetFolder(".")
   
    strSampleFilePath = fso.GetAbsolutePathName(folder.Path) & "\books.xml"

    frmMain.txtFilePath.Text = strSampleFilePath
   
End Sub

VB代码……太强悍了……

我依然认为c++是最强大的……