Create 2043. Simple Bank System (#918)

Author: Chayandas07

2043. Simple Bank System

@@ -0,0 +1,47 @@
+class Bank {
+public:
+    vector<long long int>Bank_balance;
+    int n ;
+    Bank(vector<long long>& balance) {
+        Bank_balance = balance;
+        n = balance.size();
+    }
+    
+    bool transfer(int account1, int account2, long long money) {
+        if((account1 >=1 && account1 <= n) && (account2 >= 1 && account2 <= n)){
+        if(Bank_balance[account1-1] >= money){
+            Bank_balance[account1-1] -= money;
+            Bank_balance[account2-1] += money;
+            return true;
+        }
+        }
+        return false;
+    }
+    
+    bool deposit(int account, long long money) {
+         if(account >= 1 && account <= n){
+            Bank_balance[account-1] += money;
+            return true;
+         }
+         return false;
+    }
+    
+    bool withdraw(int account, long long money) {
+        if(account >= 1 && account <= n){
+            if(Bank_balance[account -1] >= money){
+                Bank_balance[account-1] -= money;
+                return true;
+            }
+            return false;
+        }
+        return false;
+    }
+};
+
+/**
+ * Your Bank object will be instantiated and called as such:
+ * Bank* obj = new Bank(balance);
+ * bool param_1 = obj->transfer(account1,account2,money);
+ * bool param_2 = obj->deposit(account,money);
+ * bool param_3 = obj->withdraw(account,money);
+ */