BBB

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <stdbool.h>

#define MAX 61
#define input_length 500

struct SymbolInfo{
    char symbol[input_length];
    char type[input_length];
    struct SymbolInfo* next;
};

struct SymbolInfo* SymbolTable[MAX];
struct SymbolInfo* temp;

void reset_table(){
    for(int i = 0; i < MAX; i++)
        SymbolTable[i] = NULL;
}

void print_message(){
    printf("\nPlease Choose option from below:");
    printf("\n1.Insert  2.Search  3.Delete  4.Show  0.EXIT");
}

int getHashKey(char const str[]){
    int length = strlen(str), sum = 0;
    for(int i = 0; i < length; i++)
        sum += str[i];
    return (sum % MAX);
}

void Insert(char const symbol[], char const type[]){
    int hashKey = getHashKey(symbol);
    temp = (struct SymbolInfo*) malloc(sizeof(struct SymbolInfo));
    strcpy(temp->symbol, symbol);
    strcpy(temp->type, type);
    temp->next = SymbolTable[hashKey];
    SymbolTable[hashKey] = temp;
}

struct SymbolInfo* Search(char const symbol[], char const type[]){
    int hashKey = getHashKey(symbol);
    temp = SymbolTable[hashKey];
    while(temp != NULL && (strcmp(temp->symbol, symbol) || strcmp(temp->type, type)))
        temp = temp->next;
    return temp;
}

bool Delete(char const symbol[], char const type[]){
    int hashKey = getHashKey(symbol);
    if(SymbolTable[hashKey] != NULL){
        temp = SymbolTable[hashKey];
        if(strcmp(temp->symbol, symbol)==0 && strcmp(temp->type, type)==0){
            SymbolTable[hashKey] = temp->next;
            free(temp);
        }
        else{
            while((temp->next != NULL) && (strcmp(temp->next->symbol, symbol) || strcmp(temp->next->type, type)))
                temp = temp->next;

            if((temp->next != NULL) && (strcmp(temp->next->symbol, symbol) == 0 && strcmp(temp->next->type, type) == 0)){
                struct SymbolInfo* temporary = temp->next;
                temp->next = temp->next->next;
                free(temporary);
            }
            else if((temp->next == NULL) && strcmp(temp->symbol, symbol) == 0 && strcmp(temp->type, type) == 0)
                free(temp);
            else return 0;
        }
    }
    else return 0;

    return 1;
}

void Show(){
    printf(" ______________________________________\n");
    for(int i = 0; i < MAX; i++){
        if(SymbolTable[i] != NULL){
            printf("  SymbolTable[%d] = ", i);
            temp = SymbolTable[i];
            while(temp->next != NULL){
                printf("(%s, %s)->", temp->symbol, temp->type);
                temp = temp->next;
            }
            printf("(%s, %s)\n", temp->symbol, temp->type);
        }
    }
    printf(" ______________________________________\n");
}

int main(){
    int number_of_element=0;

    print_message();
    int op;
    scanf("%d", &op);
    while(1){
        if(op == 0) return 0;
        else if(op == 4){
            if(number_of_element){
                printf("\nTotal number of token in SymbolTable: %d\n", number_of_element);
                Show();
            }
            else printf("SymbolTable is empty!!\n");
        }
        else{
            char symbol[input_length], type[input_length];

            printf("Input Symbol: \n");
            scanf("%s", symbol);
            printf("Input Type: \n");
            scanf("%s", type);

            if(op == 1){
                if(Search(symbol, type) == NULL){
                    Insert(symbol, type);
                    printf("Succesfully inserted token <%s, %s> in the SymbolTable\n",
                           symbol, type);
                    number_of_element++;
                }
                else printf("Token <%s, %s> already exists in SymbolTable", symbol, type);
            }
            else if(op == 2){
                if(Search(symbol, type) != NULL)
                    printf("Token <%s, %s> exists in the SymbolTable\n", symbol, type);
                else printf("Token <%s, %s>  does not exist in the SymbolTable\n", symbol, type);
            }
            else if(op == 3){
                if(Delete(symbol, type)){
                    printf("Succesfully deleted token <%s, %s> from the SymbolTable\n",
                           symbol, type);
                    number_of_element--;
                }
                else printf("Not possible to delete, token <%s, %s>  does not exist in the SymbolTable\n", symbol, type);
            }
            else printf("Wrong Keyword\n");
        }

        print_message();
        scanf("%d", &op);
    }
}