int main()
{
int i;
struct Grammar *pointer;
struct Grammar *pointer1;
struct Grammar *pointer2;
pointer = (struct Grammar *)malloc(sizeof(struct Grammar));
pointer1 = (struct Grammar *)malloc(sizeof(struct Grammar));
pointer2 = (struct Grammar *)malloc(sizeof(struct Grammar));
printf("Grammar[Vn, Vt, P, S] Test\n");
printf("Input(1: Use built-in example 2: Input random grammar): ");
scanf("%d", &i);
if (i == 1) {
// Initialize grammar's data.
pointer->vn_len = 4;
pointer->vt_len = 3;
pointer->production_num = 7;
pointer->vn[0] = 'S';
pointer->vn[1] = 'U';
pointer->vn[2] = 'V';
pointer->vn[3] = 'W';
pointer->vt[0] = 'a';
pointer->vt[1] = 'b';
pointer->vt[2] = 'c';
pointer->s = 'S';
pointer->production[0].tail_len = 2;
pointer->production[1].tail_len = 1;
pointer->production[2].tail_len = 1;
pointer->production[3].tail_len = 1;
pointer->production[4].tail_len = 2;
pointer->production[5].tail_len = 2;
pointer->production[6].tail_len = 2;
pointer->production[0].head[0] = 'S';
pointer->production[0].tail[0] = 'a';
pointer->production[0].tail[1] = 'S';
pointer->production[1].head[0] = 'S';
pointer->production[1].tail[0] = 'W';
pointer->production[2].head[0] = 'S';
pointer->production[2].tail[0] = 'U';
pointer->production[3].head[0] = 'U';
pointer->production[3].tail[0] = 'a';
pointer->production[4].head[0] = 'V';
pointer->production[4].tail[0] = 'b';
pointer->production[4].tail[1] = 'V';
pointer->production[5].head[0] = 'V';
pointer->production[5].tail[0] = 'a';
pointer->production[5].tail[1] = 'c';
pointer->production[6].head[0] = 'W';
pointer->production[6].tail[0] = 'a';
pointer->production[6].tail[1] = 'W';
for (i = 0; i < 7; i++) {
pointer->production[i].choose_flag = 0;
}
}
else if (i == 2) {
inputGrammar(pointer);
}
else {
printf("Error, choice is not within the specified range!");
exit(0);
}
displayGrammar(pointer, 0);
deleteUselessGrammar1(pointer, pointer1);
deleteUselessGrammar2(pointer1, pointer2);
return 0;
}
/* constructor
* initial garmmar input path
* */
Parser:: Parser(char* input_path){
inputGrammar(input_path);
}
