boolean type grep

#include <stdio.h>
#include <string.h>
#define MAX     100
unsigned char
read_line(char *line, char *word);
int main()
{
        char line[MAX];
        if (read_line(line, "test_word") != 0)
                printf("found word\n");
        else
                printf("not found\n");
        return (0);
}
unsigned char
read_line(char *line, char *word) {
        int c;
        unsigned char i = 0;
        while ((c = getchar()) != EOF && i < MAX - 1)
                line[i++] = c;
        line[i] = '\0';
        if (strstr(line, word) != 0)
                return (1);
        else
                return (0);
}