Integer_plus_1

#include <iostream>

using namespace std;

#define MAX_SIZE 64

int main(int argc, char const* argv[])
{
    char buffer[MAX_SIZE] = { '0' };
    char* ptr = buffer;
    ptr++;

    cout << "Give a Non-Negative Number: " << endl;
    cin >> ptr;

    int i = 0;
    while (buffer[++i] != '\0')
        ;

    buffer[--i]++;

    while (i > 0) {
        if (buffer[i] > '9') {
            buffer[i] -= 10;
            buffer[i - 1] += 1;
            i--;
        } else {
            break;
        }
    }

    if (buffer[0] == '0') {
        cout << ptr << endl;
    } else {
        cout << buffer << endl;
    }

    return 0;
}