[英]How to run c++ and javascript client code (hackerrank style) on local machine
I am working on learning C++ and Javascript by solving Hackerrank problems.我正在通过解决 Hackerrank 问题来学习 C++ 和 Javascript。 Right now C++ compiles but when I run it stalls.
现在 C++ 可以编译,但是当我运行时它会停止。 The same with my JavaScript.
我的 JavaScript 也是如此。 I would like to learn to feed in data for test cases like they do on the platform.
我想学习为测试用例输入数据,就像他们在平台上所做的那样。 For example: If I have this code in C++:
例如:如果我在 C++ 中有此代码:
#include <string>
#include <cstdio>
#include <iostream>
using namespace std;
vector<string> split_string(string);
// Complete the countApplesAndOranges function below.
void countApplesAndOranges(int s, int t, int a, int b, vector<int> apples, vector<int> oranges) {
int count_a = 0;
int count_b = 0;
for (int i = 0; i < apples.size(); i++){
// apples[i] += a;
apples[i] += a;
if (s <= apples[i] && apples[i] <= t )
count_a +=1;
// cout << apples[i] << ;
}
// for (auto i: apples)
// // cout << i << ' ';
// cout << endl;
for (int i = 0; i < oranges.size(); i++){
// apples[i] += a;
oranges[i] += b;
if (s <= oranges[i] && oranges[i] <= t )
count_b +=1;
// cout << oranges[i] << "";
}
// for (auto i: oranges)
// // cout << i << ' ';
cout << count_a << endl;
cout << count_b;
}
int main()
{
string st_temp;
getline(cin, st_temp);
vector<string> st = split_string(st_temp);
int s = stoi(st[0]);
int t = stoi(st[1]);
string ab_temp;
getline(cin, ab_temp);
vector<string> ab = split_string(ab_temp);
int a = stoi(ab[0]);
int b = stoi(ab[1]);
string mn_temp;
getline(cin, mn_temp);
vector<string> mn = split_string(mn_temp);
int m = stoi(mn[0]);
int n = stoi(mn[1]);
string apples_temp_temp;
getline(cin, apples_temp_temp);
vector<string> apples_temp = split_string(apples_temp_temp);
vector<int> apples(m);
for (int i = 0; i < m; i++) {
int apples_item = stoi(apples_temp[i]);
apples[i] = apples_item;
}
string oranges_temp_temp;
getline(cin, oranges_temp_temp);
vector<string> oranges_temp = split_string(oranges_temp_temp);
vector<int> oranges(n);
for (int i = 0; i < n; i++) {
int oranges_item = stoi(oranges_temp[i]);
oranges[i] = oranges_item;
}
countApplesAndOranges(s, t, a, b, apples, oranges);
return 0;
}
vector<string> split_string(string input_string) {
string::iterator new_end = unique(input_string.begin(), input_string.end(), [] (const char &x, const char &y) {
return x == y and x == ' ';
});
input_string.erase(new_end, input_string.end());
while (input_string[input_string.length() - 1] == ' ') {
input_string.pop_back();
}
vector<string> splits;
char delimiter = ' ';
size_t i = 0;
size_t pos = input_string.find(delimiter);
while (pos != string::npos) {
splits.push_back(input_string.substr(i, pos - i));
i = pos + 1;
pos = input_string.find(delimiter, i);
}
splits.push_back(input_string.substr(i, min(pos, input_string.length()) - i + 1));
return splits;
}
How would I go about "feeding" it inputs.我将如何“喂养”它的输入。
Similarly, for the JavaScript:同样,对于 JavaScript:
'use strict';
process.stdin.resume();
process.stdin.setEncoding('utf-8');
let inputString = '';
let currentLine = 0;
process.stdin.on('data', inputStdin => {
inputString += inputStdin;
});
process.stdin.on('end', _ => {
inputString = inputString.replace(/\s*$/, '')
.split('\n')
.map(str => str.replace(/\s*$/, ''));
main();
});
function readLine() {
return inputString[currentLine++];
}
// Complete the countApplesAndOranges function below.
function countApplesAndOranges(s, t, a, b, apples, oranges) {
let count_a = 0
let count_b = 0
for (let i = 0; i < apples.length; i++){
apples[i] += a
if (s <= apples[i] && apples[i] <= t)
count_a += 1
}
for (let i = 0; i < oranges.length; i++){
oranges[i] += b
if (s <= oranges[i] && oranges[i] <= t)
count_b += 1
}
console.log(count_a)
console.log(count_b)
}
function main() {
const st = readLine().split(' ');
const s = parseInt(st[0], 10);
const t = parseInt(st[1], 10);
const ab = readLine().split(' ');
const a = parseInt(ab[0], 10);
const b = parseInt(ab[1], 10);
const mn = readLine().split(' ');
const m = parseInt(mn[0], 10);
const n = parseInt(mn[1], 10);
const apples = readLine().split(' ').map(applesTemp => parseInt(applesTemp, 10));
const oranges = readLine().split(' ').map(orangesTemp => parseInt(orangesTemp, 10));
countApplesAndOranges(s, t, a, b, apples, oranges);
}
I understand I could do this manually - by hardcoding local-variables to main() but I would like to learn about C++ - getline() function as well as JavaScript - process.stdin.我知道我可以手动执行此操作 - 通过将本地变量硬编码到 main() 但我想了解 C++ - getline() 函数以及 JavaScript - process.stdin。
Thank you in advance for the help.预先感谢您的帮助。
I figured out the C++, you have to add the input: eg.我想出了 C++,你必须添加输入:例如。
7 11
5 15
3 2
-2 2 1
5 -6
It must be the exact number of lines as there are variables, or redirect the input from a file ie.它必须是确切的行数,因为有变量,或者重定向来自文件的输入,即。
$ ./a.out < input.txt
For the JavaScript you must either: Redirect the input:对于 JavaScript,您必须: 重定向输入:
$ node program.js < input.txt
or add lines and press to signify the end of input stream.或添加行并按 表示输入流结束。
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