findLettersFunctions 1

#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];
    }
}

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


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

    // uppercase / lineEnd / nulls out numbers
    for(int i = 0; i < 27;i++){
        numbers[i]=0;
    }

    // Fills an array with letters
    for(int i = 0 ;i < 27; i++){
        letters[i]=65+i;
    }

    for( int i = 0 ;i < length;i++){
        if(userLine[i]>='a' && userLine[i]<='z'){
            userLine[i]=(int)userLine[i]-32;
        }
    }

    // count number of letters

    for(int i = 0; i < lineEnd; i++){
        if(userLine[i]>='A' && userLine[i]<='Z'){
            numbers[(int)userLine[i]-65]++;
        }
    }

    // sort
    for( int i = 0; i < 26;i++){
        for(int j = 0; j < 26-i-1; j++){
            if(numbers[j-1] <= numbers[j]){
                bufN = numbers[j];
                bufC = userLine[j];

                numbers[j]=numbers[j-1];
                numbers[j-1]=bufN;

                letters[j]=letters[j-1];
                letters[j-1]=bufC;

            }
        }
    }

    output(numbers,letters);

}