cppStrManipulation

#include <iostream>

char* strDelIdx(char* str, int idx)
{
    char* start{ str };
    str += idx;
    while (*str)
    {
        *str = *(str + 1);
        ++str;
    }
    return start;
}

char* strDelCh(char* str, const char symbol)
{
    char* start{ str };
    char* ins{ str };
    while (*ins != symbol and *ins++);

    if (!*ins) { return start; };

    str = ins;
    while (*str++)
    {

        if (*str != symbol)
        {
            *ins++ = *str;
        }
    }

    return start;
}

char* strInsCh(char* str, const char symbol, int idx)
{
    char* start{ str };
    int len{ 0 };
    --idx;
    while (*str++) ++len;
    while (len != idx)
    {
        *str = *(str - 1);
        --str;
        --len;
    }
    *str = symbol;
    return start;
}

char* strInsChAlt(char* str, const char symbol, int idx)
{
    char* start{ str };
    str += idx;
    char copyFirst{ *str };
    *str = symbol;
    char copySecond;
    while (*str++)
    {
        copySecond = *str;
        *str = copyFirst;
        copyFirst = copySecond;
    }

    return start;
}

int main()
{
    char str[50]{ "Hello, bright world!" };
    std::cout << str << '\n';
    std::cout << strDelIdx(str, 5) << '\n';
    std::cout << strDelCh(str, 'l') << '\n';
    //std::cout << strInsChAlt(str, '#', 15) << '\n';
    std::cout << strInsChAlt(str,'l',14) << '\n';
    return 0;
}