new_lesson11_1

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

using namespace std;



void genCharArr(char* arr) {
    //cout << sizeof(arr) / sizeof(arr[0]) << endl;
    int sz = _msize(arr) / sizeof(arr[0]);
    for (int k = 0; k < sz; ++k) {
        arr[k] = rand() % 256;
    }
}

void showCharArr(char* arr) {
    int sz = _msize(arr) / sizeof(arr[0]);
    for (int k = 0; k < sz; ++k) {
        cout << arr[k];
    }
    cout << endl;
}

void task1() {
    int sz = 10;
    char *pArr = new char[sz];
    //char Arr[13]{};
    genCharArr(pArr);
    showCharArr(pArr);
    //cout << sizeof(Arr) / sizeof(Arr[0]) << endl;
    delete[] pArr;
}

void test_str2() {
    char str1[100]{ "Hello" };
    char str2[]{ " world" };
    strcat_s(str1, str2);
    strcat_s(str1, str2);
    cout << str1 << endl;

    strncat_s(str1, str2, 20);
    cout << str1 << endl;

    char* str3 = new char[]{ "hffhwadswsda" };
    cout << strchr(str3, 'w') << endl;

    cout << "Compare: " << _stricmp("ABC", "aBC") << endl;
    cout << "Compare: " << strcmp("DFG", "ABC") << endl;
    cout << "Compare: " << strcmp("ABC", "ABC") << endl;

    cout << "Length: " << strlen("ABCDE fg") << endl;

    char strBig[]{ "ABCdefg" };
    _strlwr_s(strBig);
    cout << "small: " << strBig << endl;

    _strupr_s(strBig);
    cout << "big: " << strBig << endl;

    _strrev(strBig);
    cout << "reverce: " << strBig << endl;

    _strnset_s(strBig, '$', 12);
    cout << strBig << endl;

    cout << strspn("ABCDEF", "EF") << endl; // ?????

    char strBig2[]{"Let me speak about the bus." };
    char* first = strstr(strBig2, "buss");
    if (first)
        cout << "It find" << endl;
    else
        cout << "Dose not find." << endl;
    //strtok_s(strBig2, " ", ppStr); // не знаем
    double x = atof("12.5");
    cout << x * 1.1 << endl;
    int k = atoi("163");
    cout << k + 23 << endl;
    long long big = atoll("12345678998545");
    cout << big << endl;
    cout << "long long: " << sizeof(long long) << endl;
    cout << "long: " << sizeof(long) << endl;
    cout << "int: "  << sizeof(int) << endl;
    if (!_itoa_s(1457.6565, strBig2, 10)) {
        cout << strBig2 << endl;
    }
}

void test_str() {
    /*
    putchar('R');
    char ch = getchar();
    cout << "You enter char: " << ch << endl;

    ch = _getch(); // #include <conio.h>
    cout << "You enter char: " << ch << endl;
    */
    char str[1024];
    gets_s(str); //#include <stdio.h>
    //cout << str;
    puts("Hello world");
}

void task2() {
    auto name = "Hello world";
    cout << name << endl;

    const char starr[] = "Hello world";
    cout << starr << endl;

    const char* starr2 = new char[] {"Hello world"};
    cout << starr2 << endl;

    char starr4[]{ "Hel\0 \t \n lo" };
    char starr5[]{ 'H', 'e', 'l', 'l', 'o' };

    cout << sizeof(starr4) / sizeof(starr4[0]) << endl;
    cout << sizeof(starr5) / sizeof(starr5[0]) << endl;
    cout << starr5 << endl;

    cout << '\0' << endl;

    char ch1[]{"a"};
    char ch2[]{'a'};
}

void my_replace(
    char* str,
    char oldChar,
    char newChar) {
    int k = 0;
    while (str[k]!= '\0') {
        if (str[k] == oldChar)
            str[k] = newChar;
        ++k;
    }
}

void my_replace(
    char* &str,
    char oldChar,
    char* newChar) {
    int size_str = _msize(str) / sizeof(str[0]);
    int size_newChar = _msize(newChar) / sizeof(newChar[0]);

    int count = 0;
    int k = 0;
    while (str[k] != '\0') {
        if (str[k] == oldChar)
            count++;
        ++k;
    }
    if (count > 0) {
        char* buff = new char[size_str - count +  (size_newChar-1) * count];
        int m = 0;
        k = 0;
        while (str[k] != '\0') {
            if (str[k] == oldChar) {
                for (int n = 0; n < size_newChar - 1; ++n) {
                    buff[m] = newChar[n];
                    ++m;
                }
            }
            else {
                buff[m] = str[k];
                ++m;
            }
            ++k;
        }
        buff[m] = str[k];
        delete[] str;
        str = buff;
    }
}



void test_my_replace() {
    char* str = new char[] {"abcdeabcde"};
    char* sub_str = new char[] {"xyz"};
    my_replace(str, 'a', sub_str);
    cout << str << endl;
    delete[] str;
    delete[] sub_str;
}

void test_concat() {
    char name[]{ "Ivan" };
    char fathername[]{"Nikolaevic"};
    char sername[]{"Kovalev"};

    char full_name[1024]{}; // "Ivan Nikolaevic Kovalev"

    strcat_s(full_name, name);
    strcat_s(full_name, " ");
    strcat_s(full_name, fathername);
    strcat_s(full_name, " ");
    strcat_s(full_name, sername);

    cout << full_name << endl;
}

void main() {
    //task1();
    //task2();
    //test_str();
    //task3();
    //test_my_replace();

    test_concat();



}