Untitled

#include<stdio.h> #include<string.h>
char result[20][20], copy[3], states[20][20]; void add_state(char a[3], int i) {
    strcpy(result[i], a);
}
void display(int n) { int k = 0;
printf("Epsilon closure of %s = { ", copy); while (k < n) {
    printf(" %s", result[k]); k++;
}
printf(" }\n");
}
int main() {
    FILE * INPUT;
    INPUT = fopen("input.dat", "r"); char state[3];
    int end, i = 0, n, k = 0;
    char state1[3], input[3], state2[3]; printf("Enter the no of states: "); scanf("%d", & n);
    printf("Enter the states :"); for (k = 0; k < 3; k++) {
        scanf("%s", states[k]);
    }
    for (k = 0; k < n; k++) { i = 0;
    strcpy(state, states[k]); strcpy(copy, state); add_state(state, i++); while (1) {
        end = fscanf(INPUT, "%s%s%s", state1, input, state2);

        if (end == EOF) { break;
        }
        if (strcmp(state, state1) == 0) { if (strcmp(input, "e") == 0) {
            add_state(state2, i++); strcpy(state, state2);
        }
        }
    }
    display(i); rewind(INPUT);
    }
    return 0;
}