find

#include <iostream>

using namespace std;

const int BUFFER_SIZE = 80;

int find(char* str, char ch)
{
    int find = -1, idx = 0;

    while (str[idx] != '\0') {
        if (str[idx++] == ch) {
            find = idx - 1;
        }
    }

    return find;
}

int main()
{
    char str[BUFFER_SIZE], ch;

    cout << "Input a string:";
    cin.getline(str, BUFFER_SIZE);

    fflush(stdin);
    cin.clear();

    cout << "Input a character:";
    cin >> ch;

    // cout << "\ns: " << str << endl;
    // cout << "ch: " << ch << "|" << unsigned(ch) << endl;
    // cout << "gcount: " << cin.gcount() << endl;

    int idx = find(str, ch);

    if (idx > -1) {
        cout << "index = " << idx << endl;
    } else {
        cout << "not found" << endl;
    }

    return 0;
}