Question

CODE IN C++

13.5 Alphabet Histogram

Write a program that reads input character by character from the given data file "data.txt"

The program should be case insensitive and count the number of occurances of each character in the

alphabet. It should print a histogram of the results as follows:

A :

B :

C : *

D : *

E : *

F :

G :

H :

I :

J : *

K :

L :

M :

N :

O :

P :

Q :

R : *

S : ***

T :

U : *

V :

W :

X :

Y :

Z :

THANK YOU

Answer 1

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main() {
    ifstream in("data.txt");
    if (in.is_open()) {
        int counts[26] = {0};
        char ch;
        while ((ch = (char) in.get()) != EOF) {
            if (ch >= 'a' && ch <= 'z') {
                ch -= 32;
            }
            counts[ch-'A']++;
        }
        for (int i = 0; i < 26; ++i) {
            cout << (char)('A'+i) << " : " << counts[i] << endl;
        }
        in.close();
    } else {
        cout << "data.txt does not exists!" << endl;
    }
    return 0;
}