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Author: bashona20

1-BasicMath.txt

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+contract BasicMath {
+  uint256 constant MAX_INT = type(uint256).max;
+
+  function adder(uint256 _a, uint256 _b) external pure returns (uint256 sum, bool error) {
+    if (_b > MAX_INT - _a) {
+      return (0, true); // Overflow occurred
+    }
+    return (_a + _b, false);
+  }
+
+  function subtractor(uint256 _a, uint256 _b) external pure returns (uint256 difference, bool error) {
+    if (_b > _a) {
+      return (0, true); // Underflow occurred
+    }
+    return (_a - _b, false);
+  }
+
+  function multiplier(uint256 _a, uint256 _b) external pure returns (uint256 product, bool error) {
+    // Check for overflow during multiplication
+    if (_a == 0 || _b > MAX_INT / _a) {
+      return (0, true); // Overflow occurred
+    }
+    return (_a * _b, false);
+  }
+
+  function modulo(uint256 _a, uint256 _b) external pure returns (uint256 remainder, bool error) {
+    // Solidity requires the divisor to be greater than zero for modulo operation
+    require(_b > 0, "Divisor cannot be zero");
+    return (_a % _b, false);
+  }
+}