adding more exercises

while-loops

Author: trayanaboykova

05-while-loop/3-more-exercises/01-dishwasher.js

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+function dishwasher(input) {
+    let detergentBottles = parseInt(input[0]);
+
+    let totalDetergent = detergentBottles * 750;
+
+    let i = 1;
+    let cycle = 1;
+    let totalDishes = 0;
+    let totalPots = 0;
+
+    while (input[i] != 'End') {
+        let items = parseInt(input[i]);
+        let neededDetergent;
+
+        if (cycle % 3 == 0) {
+            neededDetergent = items * 15;
+            totalPots += items;
+        } else {
+            neededDetergent = items * 5;
+            totalDishes += items;
+        }
+
+        if (totalDetergent >= neededDetergent) {
+            totalDetergent -= neededDetergent;
+        } else {
+            console.log(`Not enough detergent, ${neededDetergent - totalDetergent} ml. more necessary!`);
+            return;
+        }
+
+        i++;
+        cycle++;
+    }
+
+    console.log("Detergent was enough!");
+    console.log(`${totalDishes} dishes and ${totalPots} pots were washed.`);
+    console.log(`Leftover detergent ${totalDetergent} ml.`);
+}

05-while-loop/3-more-exercises/02-report-system.js

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+function reportSystem(input) {
+    let targetAmount = parseInt(input[0]);
+    let collectedCashAmount = 0;
+    let collectedCardAmount = 0;
+    let cashTransactionsCount = 0;
+    let cardTransactionsCount = 0;
+    let totalCount = 0;
+    let i = 1;
+
+    while (true) {
+        if (input[i] === "End") {
+            console.log("Failed to collect required money for charity.");
+            return;
+        }
+
+        let price = parseInt(input[i]);
+
+        totalCount++;
+
+        if (totalCount % 2 !== 0) { // Cash payment
+            if(price > 100) {
+                console.log("Error in transaction!");
+            } else {
+                console.log("Product sold!");
+                collectedCashAmount += price;
+                cashTransactionsCount++;
+            }
+        } else { // Card payment
+            if(price < 10) {
+                console.log("Error in transaction!");
+            } else {
+                console.log("Product sold!");
+                collectedCardAmount += price;
+                cardTransactionsCount++;
+            }
+        }
+
+        if(collectedCashAmount + collectedCardAmount >= targetAmount){
+            break;
+        }
+
+        i++;
+    }
+
+    let averageCash = collectedCashAmount / cashTransactionsCount;
+    let averageCard = collectedCardAmount / cardTransactionsCount;
+
+    console.log(`Average CS: ${averageCash.toFixed(2)}`);
+    console.log(`Average CC: ${averageCard.toFixed(2)}`);
+}

05-while-loop/3-more-exercises/03-stream-of-letters.js

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+function streamOfLetters(input) {
+    let currentWord = '';
+    let result = '';
+
+    let foundC = false, foundO = false, foundN = false;
+
+    for(let i = 0; i < input.length; i++) {
+        if (input[i] === "End") {
+            break;
+        }
+
+        let ch = input[i];
+        if (!/[a-zA-Z]/.test(ch)) {
+            continue;
+        }
+
+        if (ch === 'c' || ch === 'o' || ch === 'n') {
+            if (ch === 'c' && !foundC) {
+                foundC = true;
+            } else if (ch === 'o' && !foundO) {
+                foundO = true;
+            } else if (ch === 'n' && !foundN) {
+                foundN = true;
+            } else {
+                currentWord += ch;
+            }
+
+            if (foundC && foundO && foundN) {
+                result += currentWord + ' ';
+                currentWord = '';
+                foundC = foundO = foundN = false;
+            }
+        } else {
+            currentWord += ch;
+        }
+    }
+
+    console.log(result.trim());
+}

05-while-loop/3-more-exercises/04-numbers-divided-by-3-without-remainder.js

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+function numbersDividedBy3WithoutRemainder() {
+    for (let i = 1; i <= 100; i++) {
+        if (i % 3 === 0) {
+            console.log(i);
+        }
+    }
+}

05-while-loop/3-more-exercises/05-average-number.js

@@ -0,0 +1,13 @@
+function averageNumber(input) {
+    let n = parseInt(input[0]);
+    let sum = 0;
+
+    for (let i = 1; i <= n; i++) {
+        let number = parseInt(input[i]);
+        sum += number;
+    }
+
+    let average = sum / n;
+
+    console.log(average.toFixed(2));
+}