Unhandled exception 的问题

[justdy]

#define NUM 100
typedef struct numbers
{
int letter;
int num;
int blank;
int others;
}NUMBERS,*PNUMBERS;

PNUMBERS *count(char *p)
{
PNUMBERS *pcount = NULL;
int i = 0;
pcount = (PNUMBERS *)malloc(sizeof(PNUMBERS));

while (*(p+i) != '\0')
{
if ((*(p+i) > 'a' && *(p+i) < 'z') || (*(p+i) > 'A' && *(p+i) < 'Z'))
{
(*pcount)->letter++;
}
else if (*(p+i) > '0' && *(p+i) < '9')
{
(*pcount)->num++;
}
else if (*(p+i) == ' ')
{
(*pcount)->blank++;
}
else
(*pcount)->others++;
i++;
}
return(pcount);
}

int _tmain(int argc, _TCHAR* argv[])
{

char *pstr;
pstr = (char *)malloc(sizeof(char) * NUM);
printf("input a string:\n");
gets(pstr);
PNUMBERS *presult;
presult = count(pstr);
}

一调用(*pcount)->letter++;就会爆出这个Unhandled exception的错误，高手帮忙改下。谢谢

[wangdeqie]

//改成这样
#include <stdio.h>
#include <malloc.h>

#define NUM 100 
typedef struct numbers 
{ 
	int letter; 
	int num; 
	int blank; 
	int others; 
}NUMBERS,*PNUMBERS; 

PNUMBERS count(char *p) 
{ 
	PNUMBERS pcount = NULL; 
	int i = 0; 
	pcount = (PNUMBERS)malloc(sizeof(PNUMBERS)); 
	
	while (*(p+i) != '\0') 
	{ 
		if ((*(p+i) > 'a' && *(p+i) < 'z') || (*(p+i) > 'A' && *(p+i) < 'Z')) 
		{ 
			pcount->letter++; 
		} 
		else if (*(p+i) > '0' && *(p+i) < '9') 
		{ 
			pcount->num++; 
		} 
		else if (*(p+i) == ' ') 
		{ 
			pcount->blank++; 
		} 
		else 
			pcount->others++; 
		i++; 
	} 
	return(pcount); 
} 

int main(int argc, char* argv[]) //
{ 
	
	char *pstr; 
	pstr = (char *)malloc(sizeof(char) * NUM); 
	printf("input a string:\n"); 
	gets(pstr); 
	PNUMBERS presult; 
	presult = count(pstr); 
	return 0;
} 

[kkk215215]

报错的时候,会有错误提示的.然后到MSDN里找,可以找到错误提示的原因,然后自己改.