app completed

package-lock.json

@@ -3768,6 +3768,11 @@
       "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
       "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs="
     },
+    "complex.js": {
+      "version": "2.0.15",
+      "resolved": "https://registry.npmjs.org/complex.js/-/complex.js-2.0.15.tgz",
+      "integrity": "sha512-gDBvQU8IG139ZBQTSo2qvDFP+lANMGluM779csXOr6ny1NUtA3wkUnCFjlDNH/moAVfXtvClYt6G0zarFbtz5w=="
+    },
     "compressible": {
       "version": "2.0.18",
       "resolved": "https://registry.npmjs.org/compressible/-/compressible-2.0.18.tgz",
@@ -4627,6 +4632,11 @@
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
       "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
     },
+    "escape-latex": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/escape-latex/-/escape-latex-1.2.0.tgz",
+      "integrity": "sha512-nV5aVWW1K0wEiUIEdZ4erkGGH8mDxGyxSeqPzRNtWP7ataw+/olFObw7hujFWlVjNsaDFw5VZ5NzVSIqRgfTiw=="
+    },
     "escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
@@ -6337,6 +6347,11 @@
         }
       }
     },
+    "javascript-natural-sort": {
+      "version": "0.7.1",
+      "resolved": "https://registry.npmjs.org/javascript-natural-sort/-/javascript-natural-sort-0.7.1.tgz",
+      "integrity": "sha1-+eIwPUUH9tdDVac2ZNFED7Wg71k="
+    },
     "jest": {
       "version": "27.5.1",
       "resolved": "https://registry.npmjs.org/jest/-/jest-27.5.1.tgz",
@@ -7834,6 +7849,22 @@
         "tmpl": "1.0.5"
       }
     },
+    "mathjs": {
+      "version": "10.4.0",
+      "resolved": "https://registry.npmjs.org/mathjs/-/mathjs-10.4.0.tgz",
+      "integrity": "sha512-2zVrKvORwxeWbewweD5NDxkTgAMvqkwmMljHUPhDPJtX4sGJEL6ugFXQN597rhH9RGtnMxNzz/+hPGIr9UEWrg==",
+      "requires": {
+        "@babel/runtime": "^7.17.2",
+        "complex.js": "^2.0.15",
+        "decimal.js": "^10.3.1",
+        "escape-latex": "^1.2.0",
+        "fraction.js": "^4.2.0",
+        "javascript-natural-sort": "^0.7.1",
+        "seedrandom": "^3.0.5",
+        "tiny-emitter": "^2.1.0",
+        "typed-function": "^2.0.0"
+      }
+    },
     "mdn-data": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-2.0.4.tgz",
@@ -9897,6 +9928,11 @@
         "ajv-keywords": "^3.5.2"
       }
     },
+    "seedrandom": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/seedrandom/-/seedrandom-3.0.5.tgz",
+      "integrity": "sha512-8OwmbklUNzwezjGInmZ+2clQmExQPvomqjL7LFqOYqtmuxRgQYqOD3mHaU+MvZn5FLUeVxVfQjwLZW/n/JFuqg=="
+    },
     "select-hose": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/select-hose/-/select-hose-2.0.0.tgz",
@@ -10593,6 +10629,11 @@
       "resolved": "https://registry.npmjs.org/timsort/-/timsort-0.3.0.tgz",
       "integrity": "sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q="
     },
+    "tiny-emitter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.1.0.tgz",
+      "integrity": "sha512-NB6Dk1A9xgQPMoGqC5CVXn123gWyte215ONT5Pp5a0yt4nlEoO1ZWeCwpncaekPHXO60i47ihFnZPiRPjRMq4Q=="
+    },
     "tmpl": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/tmpl/-/tmpl-1.0.5.tgz",
@@ -10707,6 +10748,11 @@
         "mime-types": "~2.1.24"
       }
     },
+    "typed-function": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/typed-function/-/typed-function-2.1.0.tgz",
+      "integrity": "sha512-bctQIOqx2iVbWGDGPWwIm18QScpu2XRmkC19D8rQGFsjKSgteq/o1hTZvIG/wuDq8fanpBDrLkLq+aEN/6y5XQ=="
+    },
     "typedarray-to-buffer": {
       "version": "3.1.5",
       "resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",

package.json

@@ -6,6 +6,7 @@
     "@testing-library/jest-dom": "^5.16.2",
     "@testing-library/react": "^12.1.4",
     "@testing-library/user-event": "^13.5.0",
+    "mathjs": "^10.4.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-scripts": "5.0.0",

src/App.css

@@ -1,3 +0,0 @@
-.App {
-  text-align: center;
-}

src/App.js

@@ -1,7 +1,10 @@
-import "./App.css";
-
+import Calculator from "./components/Calculator";
 function App() {
-  return <></>;
+  return (
+    <>
+      <Calculator />
+    </>
+  );
 }
 
 export default App;

src/components/Buttons.js

@@ -0,0 +1,90 @@
+import React from "react";
+import "./styles/Buttons.css";
+// import CALCULATOR_BUTTONS from "./CalculatorButtons";
+
+const Buttons = ({
+  inputHandler,
+  clearInput,
+  backspace,
+  changePlusMinus,
+  calculateAns,
+}) => {
+  return (
+    <div className="show-btn">
+      <button className="btn exp" onClick={inputHandler}>
+        ^
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        (
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        )
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        √
+      </button>
+      <button className="btn clr" onClick={clearInput}>
+        AC
+      </button>
+      <button className="btn clr" onClick={backspace}>
+        ⌫
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        %
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        ÷
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        7
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        8
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        9
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        x
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        4
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        5
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        6
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        -
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        1
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        2
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        3
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        +
+      </button>
+      <button className="btn exp" onClick={changePlusMinus}>
+        ±
+      </button>
+      <button className="btn" onClick={inputHandler}>
+        0
+      </button>
+      <button className="btn exp" onClick={inputHandler}>
+        .
+      </button>
+      <button className="btn exp" onClick={calculateAns}>
+        =
+      </button>
+    </div>
+  );
+};
+
+export default Buttons;

src/components/Calculator.js

@@ -0,0 +1,144 @@
+import React, { useState } from "react";
+import Display from "./Display";
+import Buttons from "./Buttons";
+import "./styles/Calculator.css";
+import { evaluate, round } from "mathjs";
+
+function Calculator() {
+  const [input, setInput] = useState("");
+  const [answer, setAnswer] = useState("");
+
+  //input
+  const inputHandler = (event) => {
+    if (answer === "Invalid Input!!") return;
+    let val = event.target.innerText;
+    let str = input + val;
+    if (str.length > 14) return;
+
+    if (answer !== "") {
+      setInput(answer + val);
+      setAnswer("");
+    } else setInput(str);
+    // setInput(str);
+  };
+
+  //Clear screen
+  const clearInput = () => {
+    setInput("");
+    setAnswer("");
+  };
+
+  // check brackets are balanced or not
+  const checkBracketBalanced = (expr) => {
+    let stack = [];
+    for (let i = 0; i < expr.length; i++) {
+      let x = expr[i];
+      if (x === "(") {
+        stack.push(x);
+        continue;
+      }
+
+      if (x === ")") {
+        if (stack.length === 0) return false;
+        else stack.pop();
+      }
+    }
+    return stack.length === 0;
+  };
+
+  // calculate final answer
+  const calculateAns = () => {
+    if (input === "") return;
+    let result = 0;
+    let finalexpression = input;
+    //  finalexpression = input.replaceAll("^", "**");  //for eval()
+    finalexpression = finalexpression.replaceAll("x", "*");
+    finalexpression = finalexpression.replaceAll("÷", "/");
+
+    // evaluate square root
+    let noSqrt = input.match(/√[0-9]+/gi);
+
+    if (noSqrt !== null) {
+      let evalSqrt = input;
+      for (let i = 0; i < noSqrt.length; i++) {
+        evalSqrt = evalSqrt.replace(
+          noSqrt[i],
+          `sqrt(${noSqrt[i].substring(1)})`
+        );
+      }
+      finalexpression = evalSqrt;
+    }
+
+    try {
+      // check brackets are balanced or not
+      if (!checkBracketBalanced(finalexpression)) {
+        const errorMessage = { message: "Brackets are not balanced!" };
+        throw errorMessage;
+      }
+      result = evaluate(finalexpression); //mathjs
+    } catch (error) {
+      result =
+        error.message === "Brackets are not balanced!"
+          ? "Brackets are not balanced!"
+          : "Invalid Input!!"; //error.message;
+    }
+    isNaN(result) ? setAnswer(result) : setAnswer(round(result, 3));
+  };
+
+  // remove last character
+  const backspace = () => {
+    if (answer !== "") {
+      setInput(answer.toString().slice(0, -1));
+      setAnswer("");
+    } else setInput((prev) => prev.slice(0, -1));
+  };
+
+  // change prefix of expression
+  const changePlusMinus = () => {
+    //need to change for answer
+    if (answer === "Invalid Input!!") return;
+    else if (answer !== "") {
+      if (input.charAt(0) === "-") {
+        let plus = "+";
+        setInput(plus.concat(answer.slice(1, answer.length)));
+      } else if (input.charAt(0) === "+") {
+        let minus = "-";
+        setInput(minus.concat(answer.slice(1, answer.length)));
+      } else {
+        let minus = "-";
+        setInput(minus.concat(answer));
+      }
+      setAnswer("");
+    } else {
+      if (input.charAt(0) === "-") {
+        let plus = "+";
+        setInput((prev) => plus.concat(prev.slice(1, prev.length)));
+      } else if (input.charAt(0) === "+") {
+        let minus = "-";
+        setInput((prev) => minus.concat(prev.slice(1, prev.length)));
+      } else {
+        let minus = "-";
+        setInput((prev) => minus.concat(prev));
+      }
+    }
+  };
+
+  return (
+    <>
+      <div className="container">
+        <div className="main">
+          <Display input={input} setInput={setInput} answer={answer} />
+          <Buttons
+            inputHandler={inputHandler}
+            clearInput={clearInput}
+            backspace={backspace}
+            changePlusMinus={changePlusMinus}
+            calculateAns={calculateAns}
+          />
+        </div>
+      </div>
+    </>
+  );
+}
+
+export default Calculator;

src/components/Display.js

@@ -0,0 +1,56 @@
+import React from "react";
+import "./styles/Display.css";
+
+const Display = ({ input, setInput, answer }) => {
+  // const onChangeTagInput = (e) => {
+  //   // setInputVal(e.target.value.replace(/^[0-9 ()+-]+$/, "a"));
+  //   // if(e.target.value === "1")
+  //   setInput(e.target.value);
+  //   // console.log(e.target.value.test(/^[0-9 ()+-]+$/));
+  //   // console.log(e.target.value);
+  // };
+
+  return (
+    <>
+      <div className="display">
+        {answer === "" ? (
+          <>
+            <input
+              type="text"
+              name="input"
+              className="input"
+              style={{ padding: "29px" }}
+              value={input}
+              placeholder="0"
+              // onChange={onChangeTagInput}
+              maxLength={12}
+              disabled
+            />
+          </>
+        ) : (
+          <>
+            <input
+              type="text"
+              name="input"
+              className="value"
+              value={input}
+              placeholder="0"
+              // onChange={onChangeTagInput}
+              maxLength={12}
+              disabled
+            />
+            <input
+              type="text"
+              name="value"
+              className="input"
+              value={answer}
+              disabled
+            />
+          </>
+        )}
+      </div>
+    </>
+  );
+};
+
+export default Display;

src/components/styles/Buttons.css

@@ -0,0 +1,39 @@
+.show-btn {
+  display: grid;
+  grid-template-columns: auto auto auto auto;
+  background-color: white;
+  border-bottom-left-radius: 10px;
+  border-bottom-right-radius: 10px;
+}
+
+.btn {
+  width: 80px;
+  height: 80px;
+  margin: 6px auto;
+  font-size: 24px;
+  font-weight: 500;
+  cursor: pointer;
+  border-radius: 50%;
+  background: none;
+  border: 0px;
+}
+
+.btn:hover {
+  background-color: #6dd5ed;
+  color: white;
+  transition: background-color 0.3s ease;
+}
+
+.btn:active {
+  background-color: #48b1bf;
+  color: white;
+  transition: background-color 0.3s ease;
+}
+
+.clr {
+  color: #d66d75;
+}
+
+.exp {
+  color: #06beb6;
+}

src/components/styles/Calculator.css

@@ -0,0 +1,22 @@
+.container {
+  background-color: gainsboro;
+  min-height: 100vh;
+  min-width: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.main {
+  border: 0px;
+  box-shadow: 0px 0px 3px 0.5px #c4e0e5;
+  border-radius: 10px;
+  max-width: 400px;
+}
+
+@media (max-width: 600px) {
+  .main {
+    width: 100%;
+    height: 100%;
+  }
+}

src/components/styles/Display.css

@@ -0,0 +1,44 @@
+.display {
+  display: flex;
+  flex-direction: column;
+  padding: 10px;
+  border-top-left-radius: 10px;
+  border-top-right-radius: 10px;
+  padding-bottom: 20px;
+  background: linear-gradient(90deg, #06beb6, #48b1bf 100%);
+}
+
+.expression {
+  padding: 5px;
+  margin-bottom: 10px;
+  height: 50px;
+}
+
+.input,
+.value {
+  padding: 10px;
+  text-align: right;
+  background-color: transparent;
+  color: white;
+  border: 0px;
+  letter-spacing: 1.5px;
+}
+
+.input {
+  font-size: 35px;
+}
+
+.value {
+  font-size: 15px;
+}
+
+.input::placeholder,
+.value::placeholder {
+  color: white;
+}
+
+.input:focus-visible,
+.value:focus-visible {
+  outline-style: none;
+  outline-width: 0px;
+}