Fixed tutorial 01 & 02 for solidity 0.8.7

tutorial-01/myfirstcontract.sol

@@ -1,22 +1,24 @@
-pragma solidity ^0.5.0;
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.7;
+
+contract myfirstcontract {
 
-contract MyFirstContract {
     string private name;
     uint private age;
-
+
+
     function setName(string memory newName) public {
+
         name = newName;
+
     }
-    
+
     function getName() public view returns (string memory) {
         return name;
+
+
     }
-
-    function setAge(uint newAge) public {
-        age = newAge;
-    }
-
-    function getAge() public view returns (uint) {
-        return age;
-    }
+
+
 }

tutorial-02/myfirstcontract.sol

@@ -1,58 +1,81 @@
-pragma solidity ^0.5.0;
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.7;
 
 interface Regulator {
     function checkValue(uint amount) external returns (bool);
     function loan() external returns (bool);
 }
 
-contract Bank is Regulator {
+contract Bank is Regulator{
+
     uint private value;
-
-    constructor(uint amount) public {
+
+    constructor(uint amount) {
+
         value = amount;
     }
-    
+
     function deposit(uint amount) public {
         value += amount;
     }
-
-    function withdraw(uint amount) public {
-        if (checkValue(amount)) {
+
+    function withdrawel(uint amount) public {
+
+        if (checkValue(amount)){
             value -= amount;
+
         }
     }
-    
+
     function balance() public view returns (uint) {
+
         return value;
     }
-
-    function checkValue(uint amount) public returns (bool) {
-        // Classic mistake in the tutorial value should be above the amount
-        return value >= amount;
+
+    // Override
+
+    function checkValue(uint amount) public override view returns (bool) {
+
+        return value > amount;
+
     }
-
-    function loan() public returns (bool) {
+
+    function loan() public override view returns (bool) {
+
         return value > 0;
+
     }
+
 }
 
-contract MyFirstContract is Bank(10) {
+contract myfirstcontract is Bank(10) {
+
+    // Opposite of Java - private String firstName;
     string private name;
     uint private age;
-
+
+
     function setName(string memory newName) public {
+
         name = newName;
+
     }
-    
+
     function getName() public view returns (string memory) {
         return name;
+
     }
-    
+
     function setAge(uint newAge) public {
         age = newAge;
     }
-    
+
     function getAge() public view returns (uint) {
         return age;
+
     }
+
+
+
 }