Interview question, part 5

Find the starting position(s) of “runs” (consecutive characters) in the input from left to right.

Example input and output:

Input: 0000000000
Runs: 0

Input: 0101010101
Runs:

Input: 1111111111
Runs: 0

Input: 0110110110
Runs: 1 4 7

Input: 1110000011
Runs: 0 3 8

Input: 0010011010
Runs: 0 3 5

Program ended with exit code: 1

The answer:

#include 
using namespace std;

void print_runs(const char* input)
{
    size_t offset = 0;
    size_t index = 0;
    
    while(char current = input[index])
    {
        char next = input[index + 1];
        if(next && next == current)
        {
            cout << " " << offset;
            while(input[index] && current == input[index]) ++index;
            offset = index;
        }
        else
        {
            offset = ++index;
        }
    }
}

int main(int argv, char** argc)
{
    const char* inputs[] =
    {
        "0000000000",
        "0101010101",
        "1111111111",
        "0110110110",
        "1110000011",
        "0010011010"
    };

    for(size_t index = 0; index < (sizeof(inputs) / sizeof(*inputs)); ++index)
    {
        cout << "Input: " << inputs[index] << endl;
        cout << "Runs :";
        print_runs(inputs[index]);
        cout << endl << endl;
    }

    return 1;
}