Question

How to print string characters and their frequencies in C++

Answer 1

#include <iostream>
#include <cctype>

using namespace std;

void print_char_frequencies(string s) { 
    int letters[256] = {0}; 
      
    for (int i = 0; i < s.length(); i++) {
         if (isalpha(s[i]))
             letters[(int)s[i]]++;
    }
      
    for (int i = 0; i < 256; i++) { 
        if (letters[i] != 0) {
            printf("%c %d\n", (char)i, letters[i]);
        }
    } 
} 

int main() {
    string s = "cpp programming pro oo"; 
         
    print_char_frequencies(s);
          
    return 0; 
}

   
       
       
/*
run:
       
a 1
c 1
g 2
i 1
m 2
n 1
o 4
p 4
r 3
       
*/

 

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