#include <stdio.h>
char Str_mirror(char *napis)
{
    char tmp, *start = napis;
    int length = 0;
    for(int i = 0; *(napis+i) != '\0'; i++) length++;
    char *end = napis+length - 1;
    while(end > start)
    {
        tmp = *start;
        *start = *end;
        *end = tmp;
        start++;
        end--;
    }
}
int main()
{
    char text[]="ala ma kota.";
    Str_mirror(text);
    for(int i = 0; text[i] != '\0'; i++)
        printf("%c", text[i]);
    return 0;
}