Limbajul C. Contorizarea caracterelor

O problema simpla de C procedural din cursul Cork.

Enuntul:

"2. Write a program to keep count of the occurrence of a user specified character in a stream of characters of known length ( e.g. 50 characters ) input from the keyboard. Compare this to the total number of characters input when ignoring all but alphabetic characters."

Codul:

#include <stdio.h>

int main()

{

    char letter, c = '\0';

    int i = 0, count = 0, dc = 0;

    puts("Enter the letter to count:");

    scanf("%c", &letter);

    _flushall();

    puts("Enter a string of max. 50 characters. If shorter, put 0 at the end. Hit CR.");

    while(i < 50)

    {

       c = getchar();

       if(c != '0')

       {

            if(c == letter) count++;

            if((c >= 65 && c <= 91) || (c >= 97 && c <= 122)) dc++;

       } else break;

       i++;

    }

    printf("\nThe character %c with ASCII code %d has been found %d times.", letter, letter, count);

    printf("\nThere were %d alphabetic characters in the string out of %d characters.", dc, i);

    return 0;

}

Print screen-ul executiei: