Program to find frequency of character in string

// C++ implementation to print the character and 
// its frequency in order of its occurrence 
#include <bits/stdc++.h> 
using namespace std; 

#define SIZE 26 

// function to print the character and its frequency 
// in order of its occurrence 
void printCharWithFreq(string str) 
{ 
	// size of the string 'str' 
	int n = str.size(); 

	// 'freq[]' implemented as hash table 
	int freq[SIZE]; 

	// initialize all elements of freq[] to 0 
	memset(freq, 0, sizeof(freq)); 

	// accumulate freqeuncy of each character in 'str' 
	for (int i = 0; i < n; i++) 
		freq[str[i] - 'a']++; 

	// traverse 'str' from left to right 
	for (int i = 0; i < n; i++) { 

		// if frequency of character str[i] is not 
		// equal to 0 
		if (freq[str[i] - 'a'] != 0) { 

			// print the character along with its 
			// frequency 
			cout << str[i] << freq[str[i] - 'a'] << " "; 

			// update frequency of str[i] to 0 so 
			// that the same character is not printed 
			// again 
			freq[str[i] - 'a'] = 0; 
		} 
	} 
} 

// Driver program to test above 
int main() 
{ 
	string str = "geeksforgeeks"; 
	printCharWithFreq(str); 
	return 0; 
}