Upper Case Letter Count C++

upper case letter count C++ 

#include<iostream>

using namespace std;

//Count Uppercase, Lowercase, special character and numeric value

void count(string str){

 int Uppercase = 0;

 int Lowercase = 0;

 int digit = 0;

 int special_character = 0;

 for (int i = 0; i < str.length(); i++){

 if (str[i] >= 'A' && str[i] <= 'Z'){

 Uppercase++;

 }

 else if(str[i] >= 'a' && str[i] <= 'z'){

 Lowercase++;

 }

 else if(str[i]>= '0' && str[i]<= '9'){

 digit++;

 }

 else{

 special_character++;

 }

 }

 cout<<Uppercase<< endl;

}

int main(){

 string str;

 cin>>str;

 count(str);

 return 0;

}