compiler assignment

#include <iostream>
#include <cstdio>
#include <string>
using  namespace std;


int serial=1;

struct  table{
    char varName[100];
    char varType[100];
    char varValue[100];

    bool dlt = false;

};
struct  table st[100];

char varName[100];
char varType[100];
//char varValue[100];


void  insert();

void  varNamsearch();

void  showall();
void  showSpec();
int findSerial();


int main() {








    bool decision = true;

    while(decision){

        cout<<endl<<"1. Insert :\n";
        cout<<"2. Delete :\n";
        cout<<"3. Show specefic :\n";
        cout<<"4. Show all :\n";
        cout<<"5. Update :\n"<<endl;


        string n;
        cin>>n;

        if(n == "1" ){


            insert();


        }

        else if(n == "2"){





        }
        else if(n == "3"){



            showSpec();



        }
        else if(n == "4"){


            showall();


        }

        else{
            cout<<"Invalid input, enter again \n";
        }

    }



    return 0;
}


void  insert(){





    cin.ignore();

    string input;
    getline(cin, input);

    int findEqual;
    findEqual =  input.find('=');

    int splt=0;
    int n=0;


    if(findEqual == -1) {

        for (int i = 0; '\0' != input[i]; ++i) {
            // cout<<"first"<<endl;

            if (splt == 0) {

                if (input[i] == ' ') {

                    st[serial].varType[n] = '\0';
                } else {

                    st[serial].varType[n] = input[i];
                    n++;
                }

            }
            if (splt == 1) {

                if (input[i] == ';') {

                    st[serial].varName[n] = '\0';
                } else {

                    st[serial].varName[n] = input[i];
                    n++;
                }
            }

            if (input[i] == ' ') {

                splt++;
                n = 0;
            }

        }

        st[serial].varValue[0] ='N';
        st[serial].varValue[1] ='U';
        st[serial].varValue[2] ='L';
        st[serial].varValue[3] ='L';
        st[serial].varValue[4] ='\0';

        serial++;


    } else{ // for float amount=2.25

        //cout<<"second"<<endl;

        for (int i = 0; '\0' != input[i]; ++i) {

            if (splt == 0) {

                if (input[i] == ' ') {

                    st[serial].varType[n] = '\0';
                } else {

                    st[serial].varType[n] = input[i];
                    n++;
                }

            }
            if (splt == 1) {

                if (input[i] == '=') {

                    st[serial].varName[n] = '\0';
                } else {

                    st[serial].varName[n] = input[i];
                    n++;
                }
            }

            if(splt == 2){

                if (input[i] == ';') {

                    st[serial].varValue[n] = '\0';
                } else {

                    st[serial].varValue[n] = input[i];
                    n++;
                }

            }

            if (input[i] == '=' || input[i] == ' ') {

                splt++;
                n = 0;
            }

        }


        serial++;
    }



}


void  varNamsearch(){

    int a;


    string input;


    getline(cin, input);

    int start = input.find(' ', 0)+1;


    int i;

    int j=0;



    for ( i= start; i<input.length(); i++) {



            if(input[i]== '=' || input[i] == ';'){

                break;
            }
            else{

                varName[j] = input[i];
                j++;
                //cout<<input[i];
            };




    }

    varName[j] = '\0';

    cout<<varName;




}

void showall(){



        for (int i = 1; i <serial; ++i) {

            cout<<i<<" "<<st[i].varName<<" "<<st[i].varType<<" "<<st[i].varValue<<endl;


        }

}

void  showSpec(){

   int id = findSerial();

   if (id == -1){
       cout<<" Name not found"<<endl;
   } else {

       cout << id << " " << st[id].varName << " " << st[id].varType << " " << st[id].varValue << endl;
   }


}

int  findSerial(){


    string input;

    cin>>input;

    char x[100];

    int j;

    for (j = 0; j <input.length(); ++j) {

        x[j] = input[j];

    }

    x[j] = '\0';



    for (int i = 1; i <serial ; ++i) {


            if(strcmp(st[i].varName, x) == 0)

                return i;

    }

    return  -1;

}