count the frequency of letters in an array with random generated letters

[jp0424]

Hi everyone. It's me again. The problem is pretty much stated in the title. But I'll expand the goal of the program. The user first inputs the seed and number of characters then a set random letters (both upper and lower cases) are generated based on the user input. That part is generally done, but the second portion is the problem. So after generating the random letters, the program should count the frequency of each generated letter, and it does not matter if the letter is upper or lower case. So as an example, the generated letters are:

akIskwiF
IwoPdkqA <-- this part of the program is done
Beidbdmc

the second output (frequency) will be:

a=2
b=2
c=1
d=3
e=1
f=1
g=0

and so on.
I separated the letter increments from the actual frequency count function. So there is a separate function doing the frequency and the output from this function is placed on the 'output' function. So the syntax of the cout portion of the output function (in theory), is:

cout<<ch<<" = "<<(cntChar freq. for each letter)<<endl;
 

where ch comes from a loop that increments the letters and cntChar is the frequency of each letter.
Oh well just run the code below to see what I'm talking about. Judging by what I have done though, the problem is referencing the values of the array to the cntChar function (for it to work) and transporting the frequency value of each letter to the output function. I'll find some solutions to this but for the meantime this is it. Thank you very much.

#include <cstdlib>
#include <iostream>
 
using namespace std;
 
const int size = 100;
char val(int& length, int& seed);
int inLgth(int& length, int& seed);
int output(char& input);
 
int main(){
    char a[size], input, ch;
    int seed, length, i;
    bool repeat = false;
    cout<<"Enter the seed number: ";cin>>seed;
    cout<<endl;
    do{
    inLgth(length, seed);
    output(input);
    system("cls");
    } while(input == 'y' || input == 'Y');
    if (input != 'y' || input != 'Y') exit(1);
 system ("pause");
 return 0;
 }
 
int inLgth(int& length, int& seed){
    char a[size];
    cout<<"Number of characters: ";cin>>length;
    cout<<endl
        <<"Generated characters:"<<endl<<endl;
    a[size] = val(length, seed);
    cout<<endl;
    return a[size];
}
 
char val(int& length, int& seed) {
    int i;
    srand(seed);
    for (i = 1; i <= length; i++){
    if(i%10==0)cout<<endl;
    char num = rand() % 52;
    if (num < 26) {
        num += 'a';
    } else {
        num -= 26;
        num += 'A';
    }cout<<num;
    }cout<<endl;
}
 
int cntChar( char a[size] , char& ch, int& length ){
      int cntCh = 0;   
      for (int i = 0; i<=length; i++){
               if ( a[size] == ch )
                     cntCh += 1;
       }
       return cntCh;
}
 
int output(char& input){
   char str, ch, cntCh;
   cout<<"Summary for the characters:"<<endl<<endl;
   for(ch='a';ch<='z';ch++){
   cout<<ch<<" = "<<cntCh<<endl;
   }
   cout<<endl
       <<"Repeat? (same seed) (Y/N) ";cin>>input;
   return input;
}
 

[weaknessforcats]

I would use two arrays like this:

char data[5];
int frequency[5];

So search data for your character. If you find it at data[i] then add one to frequency[i]. When you have processed all the data, the frequency counts are in the other array. Just display that array.