Question

Hello this is for C++ language. I am currently stuck on creating my api for Day Trading Stocks. as follows I need an api for *//Function Signature * * parameter: * * Return Value: ** *// Write the following function taking in an integer vector (vector &prices) consisting of all prices, in chronological order, for an hypothetical instrument. Your function recommends the maximum profit an investor can make by placing AT MOST one buy and one sell order in the time slice represented by your input vector. Remember BUY LOW, SELL HIGH:

Answer 1

#include <bits/stdc++.h>

using namespace std;

string ltrim(const string &);
string rtrim(const string &);
vector<string> split(const string &);

/*
 * Complete the 'stockmax' function below.
 *
 * The function is expected to return a LONG_INTEGER.
 * The function accepts INTEGER_ARRAY prices as parameter.
 */

long stockmax(vector<int> prices) {

}

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string t_temp;
    getline(cin, t_temp);

    int t = stoi(ltrim(rtrim(t_temp)));

    for (int t_itr = 0; t_itr < t; t_itr++) {
        string n_temp;
        getline(cin, n_temp);

        int n = stoi(ltrim(rtrim(n_temp)));

        string prices_temp_temp;
        getline(cin, prices_temp_temp);

        vector<string> prices_temp = split(rtrim(prices_temp_temp));

        vector<int> prices(n);

        for (int i = 0; i < n; i++) {
            int prices_item = stoi(prices_temp[i]);

            prices[i] = prices_item;
        }

        long result = stockmax(prices);

        fout << result << "\n";
    }

    fout.close();

    return 0;
}

string ltrim(const string &str) {
    string s(str);

    s.erase(
        s.begin(),
        find_if(s.begin(), s.end(), not1(ptr_fun<int, int>(isspace)))
    );

    return s;
}

string rtrim(const string &str) {
    string s(str);

    s.erase(
        find_if(s.rbegin(), s.rend(), not1(ptr_fun<int, int>(isspace))).base(),
        s.end()
    );

    return s;
}

vector<string> split(const string &str) {
    vector<string> tokens;

    string::size_type start = 0;
    string::size_type end = 0;

    while ((end = str.find(" ", start)) != string::npos) {
        tokens.push_back(str.substr(start, end - start));

        start = end + 1;
    }

    tokens.push_back(str.substr(start));

    return tokens;
}