findLettersFunctions 3

#include <iostream>

using namespace std;

int findEndOfTheLine(char line[],int length){
    int endInt = 0;
    for( int i = 0 ;i < length;i++){
        if(line[i] == '\0'){
            endInt = i;
            break;
        }
    }
    return endInt;
}
void output(int lettersNumber[], char letters[]){
    for( int i = 0; lettersNumber[i] > 0 ;i++){
            cout << endl << letters[i] << " - " << lettersNumber[i];
    }
}
void cleanArr(int numbers[]){
     for(int i = 0; i < 26;i++){
        numbers[i]=0;
    }
}
void fillArrWithAlphabet(char letters[]){
     for(int i = 0 ;i < 26; i++){
        letters[i]=65+i;
    }
}
void makeLettersBigger(char userLine[], int arrSize){
    for( int i = 0 ;i < arrSize;i++){
        if(userLine[i]>='a' && userLine[i]<='z'){
            userLine[i]=(int)userLine[i]-32;
        }
    }
}
void fillArrWithNumbers(int lineEnd, char userLine[],int numbers[]){
    for(int i = 0; i < lineEnd; i++){
        if(userLine[i]>='A' && userLine[i]<='Z'){
            numbers[(int)userLine[i]-65]++;
        }
    }
}
void sortArrays(int numbers[], char letters[]){
    int bufInt = 0;
    char bufChar;
    for( int i = 0; i < 25;i++){
        for(int j = 0; j < 25; j++){
            if(numbers[j] < numbers[j+1]){
                bufInt = numbers[j];
                bufChar = letters[j];

                numbers[j] = numbers[j+1];
                letters[j] = letters[j+1];

                numbers[j+1] = bufInt;
                letters[j+1] = bufChar;

            }

        }
    }
}
int main()
{
    int length, lineEnd;
    char userLine[101];
    int numbers[26];
    char letters[26];
    length = 101;


while(1 > 0){
    cout << "Write in the line something ( you can type 100 symbols )" << endl;
    cin.getline(userLine,101);
    cout << userLine << endl;

    lineEnd = findEndOfTheLine(userLine,length);
    // uppercase / lineEnd / nulls out numbers
    cleanArr(numbers);
    // Fills an array with letters
    fillArrWithAlphabet(letters);
    makeLettersBigger(userLine,length);
    // count number of letters
    fillArrWithNumbers(lineEnd, userLine, numbers);
     // sort
    output(numbers,letters);
   }
}