回答編集履歴

書式の追加

2020/08/03 15:51

投稿

Jon_do

スコア1373

test CHANGED Viewed

@@ -64,10 +64,232 @@
 ```
-元のコードだと少数の計算をするとずれてたので対応する予定。
+小数の計算などの処理を追加
+なんだか酷いことに
 ```Javascript
+        const first = document.getElementById("q6-1");
+        const second = document.getElementById("q6-2");
+        const btn = document.getElementById("q6-btn");
+        const result = document.getElementById("q6result");
+        btn.addEventListener("click", () => {
+            const fVal = first.value;
+            const sVal = second.value;
+            const fNum = Number(fVal);
+            const sNum = Number(sVal);
+            if (fVal.match(/^-?[0-9]+.[0-9]+$/) || sVal.match(/^-?[0-9]+.[0-9]+$/)) {
+                changeInteger(fVal, sVal);
+            }
+            else if (Number.isInteger(fNum) && Number.isInteger(sNum)) {
+                result.innerText = calc(fNum, sNum);
+            } else {
+                result.innerText = "エラー";
+            }
+        });
+        const calc = (num1, num2) => {
+            const select = document.getElementById("op6").value;
+            switch (select) {
+                case "＋":
+                    return num1 + num2;
+                    break;
+                case "‐":
+                    return num1 - num2;
+                    break;
+                case "×":
+                    return num1 * num2;
+                    console.log(num1 * num2);
+                    break;
+                case "÷":
+                    if (num2 === 0) { return "エラー" }
+                    else {
+                        return num1 * 10000 % num2 === 0 ? num1 / num2
+                            : Math.trunc(num1 / num2) + "余り" + num1 % num2;
+                    }
+                    break;
+            }
+        }
+        const changeInteger = (num1, num2) => {
+            const num1DotLen = num1.indexOf(".") === -1 ? 0 : num1.split(".")[1].length;
+            const num2DotLen = num2.indexOf(".") === -1 ? 0 : num2.split(".")[1].length;
+            const num1Rep = num1.indexOf(".") === -1 ? num1 : num1.replace(".", "");
+            const num2Rep = num2.indexOf(".") === -1 ? num2 : num2.replace(".", "");
+            if (num1DotLen > num2DotLen) {
+                const digit = num1DotLen - num2DotLen;
+                const num1 = addZero(0, num1Rep);
+                const num2 = addZero(digit, num2Rep);
+                changeDecimal(calc(num1, num2), num1DotLen, num2DotLen);
+            } else if (num2DotLen > num1DotLen) {
+                const digit = num2DotLen - num1DotLen;
+                const num1 = addZero(digit, num1Rep)
+                const num2 = addZero(0, num2Rep);
+                changeDecimal(calc(num1, num2), num2DotLen, num1DotLen);
+            } else {
+                const num1 = addZero(0, num1Rep);
+                const num2 = addZero(0, num2Rep);
+                changeDecimal(calc(num1, num2), num1DotLen, num1DotLen);
+            }
+        }
+        const addZero = (digit, num) => {
+            const zero = "0"
+            const number = Number(num + zero.repeat(digit));
+            return number;
+        }
+        const changeDecimal = (num, dot1, dot2) => {
+            const select = document.getElementById("op6").value;
+            if (select === "＋" || select === "‐") {
+                const answer = String(num).slice(0, String(num).length - dot1) + "." + String(num).slice(String(num).length - dot1);
+                if (answer.slice(0, 1) === ".") {
+                    result.innerText = 0 + answer
+                } else if (answer.slice(0, 2) === "-.") {
+                    result.innerText = answer.slice(0, 1) + "0" + answer.slice(1, answer.length)
+                } else {
+                    result.innerText = answer
+                }
+            }
+            if (select === "×") {
+                const zero = "0";
+                const add0 = String(num).match("-")
+                    ? "-" + zero.repeat(dot1 + dot2) + String(num).replace("-", "")
+                    : zero.repeat(dot1 + dot2) + String(num);
+                if (add0.match(/[0]*$/)) {
+                    const reg = new RegExp("[0]" + "{" + (dot1 - dot2) + "}$", "g");
+                    const regNum = add0.replace(reg, "");
+                    const answer = regNum.slice(0, regNum.length - (dot1 + dot2)) + "." + regNum.slice(regNum.length - (dot1 + dot2))
+                    result.innerText = Number(answer);
+                }
+            }
+            if (select === "÷") {
+                if (String(num).indexOf("余り") === -1) {
+                    result.innerText = num;
+                } else {
+                    const remainder = String(num).split("余り")[1];
+                    const remainderDot = remainder.slice(0, remainder.length - dot1) + "." + remainder.slice(remainder.length - dot1);
+                    if (remainderDot.slice(0, 1) === ".") {
+                        result.innerText = String(num).split("余り")[0] + "余り" + 0 + remainderDot;
+                    } else if (remainderDot.slice(0, 2) === "-.") {
+                        result.innerText = String(num).split("余り")[0] + "余り" + remainderDot.slice(0, 1) + "0" + remainderDot.slice(1, remainderDot.length)
+                    } else {
+                        result.innerText = String(num).split("余り")[0] + "余り" + remainderDot;
+                    }
+                }
+            }
+        }
 ```。

文法の修正

2020/08/03 15:50

投稿

Jon_do

スコア1373

test CHANGED Viewed

@@ -63,3 +63,11 @@
         });
 ```
+元のコードだと少数の計算をするとずれてたので対応する予定。
+```Javascript
+```。

書式の改善

2020/07/31 05:36

投稿

Jon_do

スコア1373

test CHANGED Viewed

@@ -1,6 +1,8 @@
 アウトプットのため作成。とりあえず
 半角数字以外(-.+は除く)を打ち込むとエラーが出るようにしてみました。
+2進数や8進数16進数も対応しているみたいです。
 ```Javascript