输入一行字符，要求统计出英文字母、数字、空格和其它字符的个数

#include <iostream.h>
#include <ctype.h>

const long MAX = 1000;

int main()
{
char str[MAX];
long digitNumber=0, letterNumber=0, blankNumber=0, otherCharNumber=0;
long loopCount;

while(cin.getline(str,MAX), cin.rdstate() == cin.goodbit)
{
for(loopCount = 0; str[loopCount] != '\0'; loopCount ++)
{
if(isalpha(str[loopCount]) != 0)
letterNumber ++;
else if(isdigit(str[loopCount]) != 0)
digitNumber ++;
else if(str[loopCount] == ' ')
blankNumber ++;
else
otherCharNumber ++;
}
}

cout << "There are " << letterNumber << " letters!" << endl
<< "There are " << digitNumber << " digits!" << endl
<< "There are " << blankNumber << " blanks!" <&