समस्या
Money is usually stored as whole cents to avoid rounding errors, and only formatted as dollars when it is shown.
For each item, write the line <name> x<quantity> = <amount>, where amount = quantity × price in cents. After the items, write Total = <amount> with the sum of all lines.
Format every amount as dollars, a dot and exactly two digits of cents, for example 5 → 0.05 and 1250 → 12.50.
Implement format_invoice(names, quantities, cents).
Input
names, quantities, cents: Matching lists describing each item.
Output
Return the item lines followed by the total line.
सीमाएँ
0 ≤ number of items ≤ 1,000
1 ≤ quantity ≤ 1,000; 0 ≤ cents ≤ 10^6
उदाहरण
इनपुट:
cents = [250, 375]
names = ["Tea", "Cake"]
quantities = [2, 1]
अपेक्षित आउटपुट:
expected = ["Tea x2 = 5.00", "Cake x1 = 3.75", "Total = 8.75"]इनपुट:
std::vector<long long> cents = {250, 375};
std::vector<std::string> names = {"Tea", "Cake"};
std::vector<long long> quantities = {2, 1};
अपेक्षित आउटपुट:
std::vector<std::string> expected = {"Tea x2 = 5.00", "Cake x1 = 3.75", "Total = 8.75"};इनपुट:
long[] cents = new long[] {250, 375};
string[] names = new string[] {"Tea", "Cake"};
long[] quantities = new long[] {2, 1};
अपेक्षित आउटपुट:
string[] expected = new string[] {"Tea x2 = 5.00", "Cake x1 = 3.75", "Total = 8.75"};व्याख्या
2 × 250 = 500 cents is 5.00 and 375 cents is 3.75; the total is 875 cents: ["Tea x2 = 5.00", "Cake x1 = 3.75", "Total = 8.75"].
इनपुट:
cents = [5]
names = ["Gum"]
quantities = [3]
अपेक्षित आउटपुट:
expected = ["Gum x3 = 0.15", "Total = 0.15"]इनपुट:
std::vector<long long> cents = {5};
std::vector<std::string> names = {"Gum"};
std::vector<long long> quantities = {3};
अपेक्षित आउटपुट:
std::vector<std::string> expected = {"Gum x3 = 0.15", "Total = 0.15"};इनपुट:
long[] cents = new long[] {5};
string[] names = new string[] {"Gum"};
long[] quantities = new long[] {3};
अपेक्षित आउटपुट:
string[] expected = new string[] {"Gum x3 = 0.15", "Total = 0.15"};व्याख्या
3 × 5 = 15 cents, which is written 0.15: ["Gum x3 = 0.15", "Total = 0.15"].
कैसे हल करें
पहले खुद कोशिश करें, फिर एक-एक करके संकेत खोलें।
संकेत 1
Do all arithmetic in whole cents.
संकेत 2
Split cents into dollars (cents / 100) and the remainder (cents % 100).
संकेत 3
Always print the cents with two digits, so 5 cents is 0.05.
अपेक्षित जटिलता
O(number of items) time, O(number of items) extra space
संदर्भ
यह चुनौती CodeUtility के लिए अनुकूलित की गई है। ऊपर दिए गए स्टेटमेंट और सीमाओं का पालन करें।