What about the problem of "no matching symbolic information found"in this function?

Code:

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The code:

#include<stdio.h>
#include<stdlib.h>
#define MaxSize 50
char postexp[MaxSize];
typedef struct{
        char elem[MaxSize];
        int top;}SqStack;
void InitStack(SqStack *&s)
{s=(SqStack *)malloc(sizeof(SqStack));
s->top=-1;}
int push(SqStack *&s,char e)
{if(s->top==MaxSize-1) return 0;
s->top++;
s->elem[s->top]=e;
return 1;}

void trans(char *exp)
{SqStack *s;int i=0;
while(*exp!='\0')
{switch(*exp)
{case '(':push(s,*exp);exp++;break;
 case ')':while(s->elem[s->top]!='(')
 {postexp[i++]=s->elem[s->top];
    s->top--;}
    s->top--;exp++;break;
 case '*':
 case '/':if(s->elem[s->top]=='*'||s->elem[s->top]=='/')
    postexp[i++]=s->elem[s->top];
          s->top--;push(s,*exp);exp++;break;
 case '+':
 case '-':while(s->top!=-1&&s->elem[s->top]!='(')
    {postexp[i++]=s->elem[s->top];s->top--;}
  push(s,*exp);exp++;break;
 case ' ':exp++;break;
 default:while(*exp>='0'&&*exp<='9')
  {postexp[i++]=*exp;exp++;}
  postexp[i++]='#';}}
while(s->top!=-1)
{postexp[i++]=s->elem[s->top];
s->top--;}
postexp[i]='\0';

}

void main()
{SqStack *s;char exp[]="2+3*4/(5+6)";
InitStack(s);
trans(exp,postexp);
gets(postexp);
}



Compile with  VC seems OK
but the running process throws exception,
and debug information as follows:

Loaded symbols for 'H:\Visual C++ 6.0\新建文件夹\MSDev98\MyProjects\EXP\Debug\EXP.exe'
Loaded 'C:\WINDOWS\system32\ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\version.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\advapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\secur32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\user32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\gdi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shlwapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imm32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\lpk.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\usp10.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\apphelp.dll', no matching symbolic information found.
The thread 0xF08 has exited with code 0 (0x0).


  How dizzy I am to find out the problem .Any friend can help me?

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Please indent the code properly otherwise it is too hard for others to read your code.

Quote:

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Compile with VC seems OK

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Hmm,that's odd as there are a couple(or more) of syntax errors in the code.

Code:

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void InitStack(SqStack *&s)

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should probably be,

Code:

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void InitStack(SqStack *s)

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Also,function trans() takes only one argument instead of two.
and order of certain statements in main() is probably wrong.[Normal flow of execution is from top->bottom in structural programming].
Use of gets() should be avoided so is void main().

There's nothing wrong with your setup (well, nothing which prevents you debugging it at any rate).

> Loaded symbols for 'H:\Visual C++ 6.0\新建文件夹\MSDev98\MyProjects\EXP\Debug\EXP.exe'
This is good, you can debug your code.

> The thread 0xF08 has exited with code 0 (0x0).
This means your program finished normally.

> Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information found.
This just means that IF you really wanted to single step your way right the way down to the kernel, that you would have a hard time when you got there.
Unless you have specific problems within these DLLs (not likely for a beginner), then you can ignore these kinds of warnings. They don't prevent you from running and debugging your own code.

Code:

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I changed  my  former  code  and  it  shows as follows ,compiling  and  running with VC shows OK  this time!
It is  because  some  semanteme error in function  which lead to dead recycle  I think!

#include<stdio.h>
#define MaxSize 50
 
void trans(char *exp,char postexp[])
{ struct
  {char elem[MaxSize];
        int top;
    }s;
       
  s.top=-1;
        int i=0;
while(*exp!='\0')
{switch(*exp)
{case '(':s.top++;s.elem[s.top]=*exp;exp++;break;
 case ')':while(s.elem[s.top]!='(')
          {postexp[i++]=s.elem[s.top];
              s.top--;
                          }
            s.top--;
                exp++;break;
 case '*':
 case '/':if(s.elem[s.top]=='*'||s.elem[s.top]=='/')
        {postexp[i++]=s.elem[s.top];s.top--;}
        s.top++;s.elem[s.top]=*exp;     
        exp++;break;
case '+':
case '-':while(s.top!=-1&&s.elem[s.top]!='(')
          {postexp[i++]=s.elem[s.top];s.top--;}
              s.top++;s.elem[s.top]=*exp;
                    exp++;break;
        case ' ':exp++;break;
default:while(*exp>='0'&&*exp<='9')
              {postexp[i++]=*exp;exp++;}
        postexp[i++]='#';
                      }
                }
while(s.top!=-1)
{postexp[i++]=s.elem[s.top];
s.top--;
        }

postexp[i]='\0';

      }

 void main()
{char exp[]="2+3*4/(5+6)";
char postexp[MaxSize];
trans(exp,postexp);
puts(postexp);
}

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You're still using void main
Your indentation still sucks.

Quote:

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Originally Posted by Salem

You're still using void main
Your indentation still sucks.

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I think next time I will be more conscious about it.I'm a chinese student and is perparing for Postgraduate entrance exam majored in computer science .
I really interested in it. Thanks very much for your attention ,Salem!