solved the problem

driver.cpp

@@ -0,0 +1,100 @@
+#include "split_service.h"
+
+int main()
+{
+   SplitService *ser = new SplitService(4);
+
+   User *U1 = new User(0, "u1", "Susmita", "sm@com", "11890");
+   ser->set_user_table("u1", U1);
+
+   User *U2 = new User(1, "u2", "Ayan", "ay@com", "11890");
+   ser->set_user_table("u2", U2);
+
+   User *U3 = new User(2, "u3", "Moumita", "mm@com", "11890");
+   ser->set_user_table("u3", U3);
+
+   User *U4 = new User(3, "u4", "Subhayan", "sb@com", "11890");
+   ser->set_user_table("u4", U4);
+
+   int cont = 0;
+   do{
+        cout << "Enter operation " << endl;
+        string op;
+        cin >> op;
+        if (op == "SHOW")
+        {
+           cout << "for a specific user?" << endl;
+           string ans;
+           cin >> ans;
+           if (ans == "YES" || ans == "Yes" || ans == "yes")
+             {
+                cout << "Enter user id" << endl;
+                string u;
+                cin >> u;
+                ser->SHOW(u, 0);
+             }
+           else
+             {
+                ser->SHOW_ALL();
+             }
+        }
+        else if (op == "EXPENSE")
+        {
+           int num = 0;
+           string payer;
+           vector <string> users;
+           string type;
+           int total;
+           cout << "Enter payer " << endl;
+           cin >> payer;
+           cout << "Enter total " << endl;
+           cin >> total;
+           cout << "Enter no of users " << endl;
+           cin >> num;
+           cout << "enter user_ids " << endl;
+           for (int i = 0; i<num; i++)
+           {
+              string u;
+              cin >> u;
+              users.push_back(u);
+           }
+           cout << "Enter type of expense, EXACT, EQUAL or PERCENT " << endl;
+           cin >> type;
+           if (type == "EQUAL")
+             ser->EXPENSE_EQUAL(total, payer, users);
+           else if (type == "EXACT")
+           {
+              cout << "Enter amounts " << endl;
+              vector <int> amounts;
+              for (int i = 0; i<num; i++)
+              {
+                 int amount;
+                 cin >> amount;
+                 amounts.push_back(amount);
+              }
+              ser->EXPENSE_EXACT(total, payer, users, amounts);
+           }
+           else if (type == "PERCENT")
+           {
+              cout << "Enter percents " << endl;
+              vector <float> percents;
+              for (int i = 0; i<num; i++)
+              {
+                 float percent;
+                 cin >> percent;
+                 percents.push_back(percent);
+              }
+              ser->EXPENSE_PERCENT(total, payer, users, percents);
+           }
+           else 
+             cout << "INVALID TYPE" << endl;
+        }
+        else
+          cout << "INVALID OPERTAION " << endl;
+
+        cout << "Press 1 to continue" << endl;
+        cin >> cont;
+   }while (cont == 1);
+
+   return 0;
+}

output.txt

@@ -0,0 +1,207 @@
+Enter operation 
+SHOW  
+for a specific user?
+n
+No balances
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+YES
+Enter user id
+u1
+No balances
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u2
+Enter total 
+1000
+Enter no of users 
+4
+enter user_ids 
+u1 u2 u3 u4
+Enter type of expense, EXACT, EQUAL or PERCENT 
+EQUAL
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+yes
+Enter user id
+u1
+u1 owes u2: 250
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+yes
+Enter user id
+u2
+u1 owes u2: 250
+u3 owes u2: 250
+u4 owes u2: 250
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+n
+u1 owes u2: 250
+u3 owes u2: 250
+u4 owes u2: 250
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u3
+Enter total 
+2000
+Enter no of users 
+3
+enter user_ids 
+u1 u2 u4
+Enter type of expense, EXACT, EQUAL or PERCENT 
+EXACT
+Enter amounts 
+1000 500 500
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+yes
+Enter user id
+u3
+u1 owes u3: 1000
+u2 owes u3: 250
+u4 owes u3: 500
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u1
+Enter total 
+1000
+Enter no of users 
+1
+enter user_ids 
+u3
+Enter type of expense, EXACT, EQUAL or PERCENT 
+PERCENT
+Enter percents 
+100
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+yes
+Enter user id
+u1
+u1 owes u2: 250
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+yes
+Enter user id
+u3
+u2 owes u3: 250
+u4 owes u3: 500
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u2
+Enter total 
+250
+Enter no of users 
+1
+enter user_ids 
+u3
+Enter type of expense, EXACT, EQUAL or PERCENT 
+EXACT
+Enter amounts 
+250
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+n
+u1 owes u2: 250
+u4 owes u2: 250
+u4 owes u3: 500
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u4
+Enter total 
+750
+Enter no of users 
+2
+enter user_ids 
+u2 u3
+Enter type of expense, EXACT, EQUAL or PERCENT 
+PERCENT
+Enter percents 
+25 70
+invalid_entry!!!
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u4
+Enter total 
+750
+Enter no of users 
+2
+enter user_ids 
+u2 u3
+Enter type of expense, EXACT, EQUAL or PERCENT 
+EXACT
+Enter amounts 
+250 500
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+n
+u1 owes u2: 250
+Press 1 to continue
+1
+Enter operation 
+EXPENSE
+Enter payer 
+u1
+Enter total 
+250
+Enter no of users 
+1
+enter user_ids 
+u2
+Enter type of expense, EXACT, EQUAL or PERCENT 
+EQUAL
+Press 1 to continue
+1
+Enter operation 
+SHOW
+for a specific user?
+n
+No balances
+Press 1 to continue
+0