Here is source code of the C++ program which prints occurence of characters from ‘a’ to ‘z’ in an Input File. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.
/*
* C++ Program to Print Occurence of Characters from 'a' to 'z' in an Input File
*/
#include <iostream>
#include <string>
#include <fstream>
#include <cctype>
int main()
{
int arr[26];
std::ifstream file("test.cpp");
std::string str;
for (int i = 0; i < 26; i++)
{
arr[i] = 0;
}
while (getline(file, str))
{
int i = 0;
while (str[i] != '\0')
{
if (isalpha(str[i]))
arr[(str[i] - 'a')]++;
i++;
}
}
std::cout << "Count of character \'a\' - \'z\'\n";
for (int i = 0; i < 26; i++)
{
char c = 'a' + i;
std::cout << c << " " << (arr[i] + '0') << "\t";
if ((i + 1) % 6 == 0)
std::cout << std::endl;
}
std::cout << std::endl;
file.close();
}
$ g++ main.cpp $ ./a.out Count of character 'a' - 'z' a 65 b 48 c 65 d 62 e 68 f 58 g 52 h 53 i 86 j 48 k 48 l 62 m 53 n 65 o 60 p 52 q 48 r 73 s 69 t 83 u 57 v 48 w 50 x 48 y 49 z 49