Cppcode/5.12.cpp at main · Make1205/Cppcode · GitHub

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#include <bits/stdc++.h>
using namespace std;

int qp(int a, int b)
{
    if (b == 0)
        return 1;
    if (b % 2 == 1)
        return qp(a, b / 2) * qp(a, b / 2) * a;
    if (b % 2 == 0)
        return qp(a, b / 2) * qp(a, b / 2);
    return 1;
}

inline void write(int res)
{
    if (res < 0)
    {
        putchar('-');
        res = -res;
    }
    if (res > 9)
        write(res / 10);
    putchar(res % 10 + '0');
}

inline int read()
{
    int s = 0, w = 1;
    char c = getchar();
    while (c > '9' || c < '0')
    {
        if (c == '-')
            w = -1;
        c = getchar();
    }
    while (c <= '9' && c >= '0')
    {
        s += (s << 3) + (s << 1) + c - 48;
        c = getchar();
    }
    return s * w;
}

int fun1() { return 10; }

auto fun2() { return 'g'; } // C++14

int main()
{
    int a[] = {2, 1, 4, 3, 5};
    for (auto &i : a)
    {

        i = 2 * i;
    }
    for (auto i : a)
    {

        std::cout << i << std::endl;
    }


    return 0;
}