C#

#include <stdio.h><br />
#include <stdlib.h><br />
#include <string.h><br />
<br />
typedef struct<br />
{<br />
	char *item[100];<br />
	int top;<br />
}strstk, *strstkptr;<br />
<br />
char *chartostr(char);<br />
char *process(strstkptr);<br />
char *pop(strstkptr);<br />
void push(strstkptr, char *);<br />
<br />
int main()<br />
{<br />
	strstkptr pS=(strstkptr)malloc(sizeof(strstk));<br />
	char *p;<br />
	char buf[100];<br />
	char *pV;<br />
<br />
	while(scanf("%s", buf) !=EOF){<br />
		switch(buf[0]){<br />
		case '(':<br />
		case '+':<br />
		case '*':<br />
			p=chartostr(buf[0]);<br />
			push(pS, p);<br />
			break;<br />
		case ')':<br />
			pV=process(pS);<br />
			if(pS->top==0)<br />
				printf("%s ", pV);<br />
			else<br />
				p=malloc(100);<br />
				sprintf(p,"%d", pV);<br />
				push(pS, pV);<br />
			break;<br />
		default:<br />
			break;<br />
		}<br />
	}<br />
<br />
}<br />
<br />
char *pop(strstkptr pS)<br />
{<br />
	return pS->item[--pS->top];<br />
}<br />
<br />
void push(strstkptr pS, char *pV)<br />
{<br />
	pS->item[pS->top++]=pV;<br />
}<br />
<br />
char *process(strstkptr pS)<br />
{<br />
	char *p, *py, *px;<br />
<br />
	while((p=pop(pS)) != "("){<br />
		if(p="*"){<br />
			py=pop(pS);<br />
			px=pop(pS);<br />
<br />
			//need to return digit<br />
		}<br />
		else<br />
			py=pop(pS);<br />
			px=pop(pS);<br />
<br />
			//need to return digit<br />
<br />
		<br />
	}	<br />
}<br />
<br />
char *chartostr(char ch)<br />
{<br />
	char *p=malloc(2);<br />
	p[0]=ch;<br />
	p[1]=0;<br />
	return p;<br />
}<br />

protected override void WndProc(ref Message m)
{
	NMHEADER header;

	if(m.Msg == 0x004E)
	{
		header = (NMHEADER) Marshal.PtrToStructure(m.LParam, typeof(NMHEADER));

		int code = (int)header.hdr.code;

		if(code == -308)
		{
					
					
		}
	}

	base.WndProc(ref m);
}

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| someText |
| hello    |
| blah     |
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| someText |
| hello    |
| blah     |
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