solved the problem

Splitwise.h

@@ -0,0 +1,128 @@
+#include<iostream>
+#include<vector>
+#include<string>
+#define no_of_user 4
+using namespace std;
+class Splitwise
+{
+    vector<vector<int>> balanceSheet;
+    vector<User> users;
+    public:
+
+
+        Splitwise(vector<User> users)
+        {
+            for(int i=0;i<users.size();i++)
+                this->users.push_back(users[i]);
+            balanceSheet.resize(no_of_user,vector<int>(no_of_user));
+        }
+        void showAll()
+        {
+            bool flag = false;
+            for(int i=0;i<no_of_user;i++)
+            {
+                for(int j=0;j<no_of_user;j++)
+                {
+                    if(balanceSheet[i][j]!=0 && i!=j)
+                    {
+                        cout<<users[j].getId()<<" owes "<<users[i].getId()<<":"<<balanceSheet[i][j]<<endl;
+                        flag = true;
+                    }
+                }
+            }
+            if(!flag)
+                cout<<"No Balances"<<endl;
+        }
+        void showId(string uid)
+        {
+            int i = findUser(uid);
+            bool flag = false;
+            for(int j=0;j<no_of_user;j++)
+            {
+                if(balanceSheet[i][j]!=0 && i!=j)
+                {
+                    cout<<users[j].getId()<<" owes "<<users[i].getId()<<":"<<balanceSheet[i][j]<<endl;
+                    flag = true;
+                }
+                if(balanceSheet[j][i]!=0 && i!=j)
+                {
+                    cout<<users[i].getId()<<" owes "<<users[j].getId()<<":"<<balanceSheet[j][i]<<endl;
+                    flag = true;
+                }
+            }
+            if(!flag)
+                cout<<"No Balances"<<endl;
+
+        }
+        void Call(vector<string> token)
+        {
+            if(token.size()==0)
+                return;
+            if(token[0].compare("SHOW")==0)
+            {
+                if(token.size()==2)
+                {
+                    showId(token[1]);
+                }
+                else
+                    showAll();
+            }
+            else //EXPENSE
+            {
+                 int i = findUser(token[1]);
+                 double amount = stoi(token[2]);
+                 int number = stoi(token[3]);
+                 if(token[4+number].compare("EQUAL")==0)
+                 {
+                     //cout<<"EQUAL "<<endl;
+                     splitEqual(token,number,i,amount);
+                 }
+                 else if(token[4+number].compare("PERCENT")==0)
+                 {
+                     //cout<<"PERCENT"<<endl;
+                    splitPercent(token,number,i,amount);
+                 }
+                 else
+                 {
+                     //cout<<"EXACT"<<endl;
+                    splitExact(token,number,i,amount);
+                 }
+            }
+        }
+        void splitEqual(vector<string> token,int number,int id,double amount)
+        {
+            //return;
+            for(int i=4;i<number+4;i++)
+            {
+                balanceSheet[id][findUser(token[i])] += amount/number;
+            }
+        }
+        void splitPercent(vector<string> token,int number,int id,double amount)
+        {
+
+            for(int i=4;i<4+number;i++)
+            {
+                int percent = stoi(token[i+1+number]);
+                //cout<<id<<" "<<findUser(token[i])<<endl;
+                balanceSheet[id][findUser(token[i])] += ((amount*percent)/100);
+            }
+        }
+        void splitExact(vector<string> token,int number,int id,double amount)
+        {
+            for(int i=4;i<4+number;i++)
+            {
+                int amt = stoi(token[i+1+number]);
+                balanceSheet[id][findUser(token[i])] += amt;
+            }
+        }
+        int findUser(string uid)
+        {
+            int i=0;
+            for(;i<no_of_user;i++)
+            {
+                if(uid.compare(users[i].getId())==0)
+                    break;
+            }
+            return i;
+        }
+};

User.h

@@ -0,0 +1,30 @@
+#include<iostream>
+#include<vector>
+#include<string>
+using namespace std;
+class User{
+    string userid;
+    string name, email;
+    long int mobile;
+    public:
+        User(string userid="",string name="",string email="",long int mobile=0)
+        {
+            this->userid = userid;
+            this->name = name;
+            this->email = email;
+            this->mobile = mobile;
+        }
+        string getName()
+        {
+            return name;
+        }
+        string getId()
+        {
+            return userid;
+        }
+        string getEmail()
+        {
+            return email;
+        }
+
+};

driver.cpp

@@ -0,0 +1,50 @@
+#include<iostream>
+#include<vector>
+#include<string>
+#include "User.h"
+#include "Splitwise.h"
+#define no_of_user 4
+using namespace std;
+
+vector<string> generateTokens(string s)
+{
+    vector<string> tokens;
+    int n = s.length();
+    for(int i=0;i<n;i++)
+    {
+        string temp;
+        while(i<n && s[i]!=' ')
+        {
+            temp.push_back(s[i]);i++;
+        }
+        tokens.push_back(temp);
+    }
+    return tokens;
+}
+
+int main()
+{
+    User u1("u1","user1","",0),u2("u2","user2","",0),u3("u3","user3","",0),u4("u4","user4","",0);
+    vector<User> users;
+    users.push_back(u1);
+    users.push_back(u2);
+    users.push_back(u3);
+    users.push_back(u4);
+    Splitwise sw(users);
+    //sw.showAll();
+    int n;
+    cin>>n;
+    //cout<<n<<endl;
+    while(n)
+    {
+        string s;
+        //cout<<"Enter string : ";
+        getline(cin,s);
+        //cout<<s<<endl;
+        //cout<<"input string is : "<<s<<endl;
+        vector<string> tokens = generateTokens(s);
+        sw.Call(tokens);
+        n--;
+    }
+    return 0;
+}