#include <stdlib.h>
int stringlen(char string[])
{
    int i = 0;
    while(string[++i]);
    return i;
}
char *strcopy(char *st1)
{
    int i = 0;
    char *string2 = malloc(sizeof(char[stringlen(st1)+1]));
    while(string2[i++])
    {
        string2[i] = *st1;
        st1++;
    }
    printf("%s", string2);
    return string2;
}

int main()
{
    char st1[] = "Name";
    char st2[] = "Henning";

    stringlen(st1);
    strcopy(st1);
}