/*
 * C Program to Find the Largest & Smallest Word in a String
 */
#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main()
{
    char string[100], word[20], max[20], min[20], c;
    int i = 0, j = 0, flag = 0;
    printf("Enter string: ");
    i = 0;
    do
        {
            fflush(stdin);
            c = getchar();
            string[i++] = c;
        }
    while (c != '
            ');
            string[i - 1] = '';
            for (i = 0; i < strlen(string); i++)
        {
            while (i < strlen(string) && !isspace(string[i]) && isalnum(string[i]))
                    {
                        word[j++] = string[i++];
                    }
                if (j != 0)
                    {
                        word[j] = '';
                        if (!flag)
                            {
                                flag = !flag;
                                strcpy(max, word);
                                strcpy(min, word);
                            }
                        if (strlen(word) > strlen(max))
                            {
                                strcpy(max, word);
                            }
                        if (strlen(word) < strlen(min))
                            {
                                strcpy(min, word);
                            }
                        j = 0;
                    }
            }
    printf("The largest word is '%s' and smallest word is '%s' in '%s'.
           ", max, min, string);
           return 0;
}



Enter string:
amazing programmers exists here
The largest word is 'programmers' and smallest word is 'here' in 'amazing programmers exists here'.