ex14.c

#include <stdio.h>
#include <ctype.h>

// forward declarations
int can_print_it(char ch);
void print_letters(char arg[]);

void print_arguments(int argc, char *argv[])
{
    int i = 0;

    for(i = 0; i < argc; i++) {
        print_letters(argv[i]);
    }
}

void print_letters(char arg[])
{
    int i = 0;

    for(i = 0; arg[i] != '\0'; i++) {
        char ch = arg[i];

        if(can_print_it(ch)) {
            printf("'%c' == %d ", ch, ch);
        }
    }

    printf("\n");
}

int can_print_it(char ch)
{
    return isalpha(ch) || isblank(ch);
}


int main(int argc, char *argv[])
{
    print_arguments(argc, argv);
    return 0;
}

test14.c

#include "stdio.h"
#include "ctype.h"

int main(int argc, char *argv[])
{
	int i = 0;
	for(i = 0; i < argc; i++){
		int j = 0;
		for(j = 0; argv[i][j] != '\0'; j++){
			if (isalpha(argv[i][j]) || isblank(argv[i][j]))
			{
				printf("%c == %d \n", argv[i][j], argv[i][j]);
			}
		}
	}

	return 0;
}