cstyleString

#include <iostream>

int strlenM(const char* str)
{
    size_t len = 0;
    for (; str[len]; len++);
    return len;
}

char* strdupM(const char* src, char* dst)
{
    size_t i = 0;
    for (; src[i]; dst[i] = src[i], i++); dst[i++] = 0;
    return dst;
}

char* strndupM(const char* src, char* dst, int size)
{
    size_t i = 0;
    for (; src[i] && i < size-1; dst[i] = src[i], i++); dst[i++] = 0;
    return dst;
}


char* strcatM(char* src, const char* dst)
{
    size_t i = strlen(src);
    size_t j = 0;
    for (; dst[j]; src[i] = dst[j], i++, j++); src[i++] = 0;
    return src;
}

char* strncatM(char* src, const char* dst, size_t size)
{
    size_t i = strlen(src);
    size_t j = 0;
    for (; dst[j] && i < size - 1; src[i] = dst[j], i++, j++); src[i++] = 0;
    return src;
}

int strstrM(const char* str, const char* search)
{
    size_t searchSize = strlenM(search);
    size_t strSize = strlenM(str);

    for (size_t strIdx=0; strIdx < strSize; strIdx++)
    {
        for (size_t searchIdx = 0, foundCnt = 0, tmpIdx = strIdx; str[tmpIdx] == search[searchIdx] and searchIdx < searchSize; searchIdx++, tmpIdx++)
        {
                if (++foundCnt == searchSize) { return strIdx; }
        }
    }
    return -1;
}

template <typename T, int size> void print(T* arr)
{
    std::cout << "Size is: " << size << " " << arr << std::endl;
}

int main()
{
    char str[20] = "Hello, World!";
    char* str1 = new char[strlenM(str)-6];
    std::cout <<strlenM(str) << " " << strndupM(str, str1, strlenM(str) - 6) << std::endl;
    delete[] str1;
    char str3[100] ="";
    char str4[] = "world!!!! :) Oh!";
    std::cout << strncatM(str3, str4, sizeof(str3)) << std::endl;
    std::cout << strncatM(str3, " Hehe! addition:)!", sizeof(str3)) << std::endl;

    std::cout << strstrM("Hello, wor ld in sun", " in") << std::endl;

    std::cin >> str3;
    std::cout <<"Simply CIN:" << str3 << std::endl;
    std::cin.ignore();
    std::cin.getline(str3, 200);
    print<char,10>(str3);
}