具有与给定字符串中其他字符频率之和相等的字符

str.length()

//including the required libraries
#include <bits/stdc++.h>
using namespace std;
 
//function to check if the frequency of occurrence of data is equivalent to other characters' frequency
bool charwithequalFreq(string str) {
   //storing the frequency of characters 
   int freq[26] = { 0 };
   //length of string 
   int len = str.length();
   //if the length of the string is odd 
   if (len % 2 == 1)
       return false;
 
   // Update the frequencies of the characters
   for (int i = 0; i < len; i++){
       char ch = str[i];
       freq[ch - 'a']+=1;
   }
        
 
   for (int i = 0; i < 26; i++)
       if (freq[i] == len / 2)
      {       
         cout<<"Holds true for character "<<(char)(i+'a') <<"\n";
         return true;
      }
   
   //none of the cases hold true
   return false;
}
//calling the frequency method
int main() {
    
   //input string
   string str = "tweeet";
 
   cout<< "Input String : "<<str<<"\n";
   //check the frquency 
   bool res = charwithequalFreq(str);
   if(!res){
      cout<<"There is no such character";
   }
   return 0;
}

Input String : tweeet
Holds true for character e