我正在编写一个程序来读取字母数字字符，大写字符，空格字符和标点字符，并且遇到了一些麻烦。这是我试图阅读的程序。
include iostream
include ctype.h
include stdio.h
include fstream
using namespace std;
int main(){
char ch;
int charCount = 0, upperCount = 0, punctCount = 0, whiteCount = 0;
ifstream file;
file.open("file.txt"); // open file
while (!file.eof()){ //while its not the end of the file
ch = file.get(); //get ch from the file
if (isalpha(ch)){ //if its an alphabetic character
charCount++;} //add one to character count
else if (isupper(ch)){ //if its an uppercase letter
upperCount++;} //add one to uppercase count
else if (ispunct(ch)){ //if its a punctuation character
punctCount++;} //add one to punctuation count
else{ //else its a whitespace character
whiteCount++;} //add one to blank count
ch++; //increment the character
} //end while
file.close(); //close file
cout << "The number of alphabetic characters is: " << charCount << endl;
cout << "The number of uppercase characters is: " << upperCount << endl;
cout << "The number of punctuation characters is: " << punctCount << endl;
cout << "The number of whitespace characters is: " << whiteCount << endl;
return 0;
}