Find the most frequent word from a sentence using C

main.c

#include <stdio.h>
#include <string.h>
int main()
{
    char a[100], b[100][100];
    int i, j = 0, k = 0, l, x, w1 = 0, w2 = 0, w3 = 0;
    printf("Enter a String:\n");
    gets(a);
    l = strlen(a);
    for (i = 0; i < l; i++)
    {
        if (a[i] != ' ')
        {
            w1++;
            while (a[i] != ' ' && a[i] != '\0')
            {
                b[j][k] = a[i];
                k++;
                i++;
            }
        }
        j++;
        k = 0;
    }
    for (i = 0; i < w1; i++)
    {
        for (j = 0; j < w1; j++)
        {
            if (strcmp(b[i], b[j]) == 0)
            {
                w2++;
            }
        }
        if (w2 > w3)
        {
            x = i;
            w3 = w2;
        }
        w2 = 0;
    }
    printf("Max Frequency: %d\n", w3);
    printf("Frequent word: %s\n", b[x]);
    return 0;
}