den 5

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

//zad1//
int strLength(strArr)
{
    printf("%d\n", strlen(strArr));
    return 0;
}
int main()
{
char strArr[10];
    gets(strArr);
    strLength(strArr);
    return 0;
}
-------------------------------------------
//zad2//
int strComp(char* str1,char* str2)
{
    if(strlen(str1) != strlen(str2))
    {
        return (*str1 - *str2) > 0 ? 1 : -1;
    }
    while(*str1)
    {
        if(*str1 != *str2)
        {
            return (*str1 - *str2) > 0 ? 1 : -1;
        }
        str1++;
        str2++;
    }
    return 0;
}
int main ()
{
char str1[25];
    char str2[25];
    gets(str1);
    gets(str2);
    printf("%d", strComp(str1, str2));
   return 0;
}
-------------------------------------------------
//zad3//
void strCopy(char* str1, const char* str2)
{
    char* p = str1;
    while(*str2)
    {
        *p = *str2;
        p++;
        str2++;
    }
    p = '\0';
}
int main ()
{
char str1[22];
    char str2[22];
    gets(str1);
    strCopy(str2, str1);
    printf("%s", str2);
}
------------------------------------------------
//zad4//
char* strConcatenate(char* destination, const char* source){

    char* str1End = destination + strSize(destination);

    while (*source != '\0') {
        *str1End++ = *source++;
    }
    *str1End = '\0';

    return destination;
}
int main ()
{
char str1[22];
    printf("Enter string: ");
    gets(str1);

    char str2[22];
    printf("Enter string: ");
    gets(str2);

    printf("Your concatenated strings: %s", strConcatenate(str1, str2));
return 0;
}
-----------------------------------------
//ZAD 5 AND 6//

#include <stdio.h>
#include <string.h>

int strsize(const char* str)
{
    int cnt = 0;
    while (*str)
    {
        cnt++;
        str++;
    }
    return cnt;
}

void strcopy(char* destination, const char* source)
{
    char* p = destination;
    while (*source)
    {
        *p = *source;
        p++;
        source++;
    }
    p = '\0';
}

int strcompare(const char* str1, const char* str2)
{
    while (*str1)
    {
        if (*str1 != *str2)
        {
            break;
        }
        str1++;
        str2++;
    }
    return *str1 - *str2;
}


int cointainsNano(const char* str)
{
    int state = 0; // empty

    while (*str)
    {
        if (state == 0)
        {
            if (*str == 'n')
            {
                state = 1; // n
            }
        }
        else if (state == 1)
        {
            if (*str == 'a')
            {
                state = 2; // na
            }
            else if (*str == 'n')
            {
                // same state
            }
            else
            {
                state = 0; // empty
            }
        }
        else if (state == 2)
        {
            if (*str == 'n')
            {
                state = 3; // nan
            }
            else
            {
                state = 0; // empty
            }
        }
        else if (state == 3)
        {
            if (*str == 'o')
            {
                state = 4;
                return 1;
            }
            else if (*str == 'n')
            {
                state = 1; // n
            }
            else if (*str == 'a')
            {
                state = 2; // na
            }
            else
            {
                state = 0; // empty
            }
        }
        str++;
    }
    return 0;
}



int countNano(const char* str)
{
    int cnt = 0;
    int state = 0; // empty

    while (*str)
    {
        if (state == 0)
        {
            if (*str == 'n')
            {
                state = 1; // n
            }
        }
        else if (state == 1)
        {
            if (*str == 'a')
            {
                state = 2; // na
            }
            else if (*str == 'n')
            {
                // same state
            }
            else
            {
                state = 0; // empty
            }
        }
        else if (state == 2)
        {
            if (*str == 'n')
            {
                state = 3; // nan
            }
            else
            {
                state = 0; // empty
            }
        }
        else if (state == 3)
        {
            if (*str == 'o')
            {
                state = 4;
                cnt++;
            }
            else if (*str == 'n')
            {
                state = 1; // n
            }
            else if (*str == 'a')
            {
                state = 2; // na
            }
            else
            {
                state = 0; // empty
            }
        }
        else if (state == 4)
        {
            if (*str == 'n')
            {
                state = 1; // n
            }
            else
            {
                state = 0; // empty
            }
        }
        str++;
    }
    return cnt;
}


int main()
{
    char str1[50];
    printf("Enter first string: ");
    gets(str1);
    printf("Contains nano: %s\n", cointainsNano(str1) ? "yes" : "no");
    printf("Count nano: %d\n", countNano(str1));
    return 0;
}