vtora

#include <iostream>

using namespace std;

void moveElements(char[], int, int);

int main() {

    int m, l;
    char str[100];
    cout << "str = ";
    cin.getline(str, 100);

    for (int i = 0; i <= 100; i++) {
        if ((int)str[i] < ' ' || str[i] > '~') {
            cout << "Error";
        }

    }


    cout << "M = ";
    cin >> m;
    if (m > 21 || m < 0) {
        cout << "Error";
    }

    cout << ", L = ";
    cin >> l;
    if (l > 100 || l < 0) {
        cout << "Error";
    }

    moveElements(str, m, l);
    return 0;
}

void moveElements(char str[], int m, int l) {
    int lastPossition = 0;
    char str2[100];
    for (int i = 0; i < 100; ++i) {
        if (str[i] == '\000') {
            lastPossition = i - 1;
            break;
        }

        int value = (int)str[i];
        str2[i] = str[i];
        if (value < 32 || value > 126 ||
            (str[i] == '\\' && (str[i + 1] == 'r' || str[i + 1] == 'n' || str[i + 1] == 't'))) {
            cout << str;
            return;
        }
    }


    for (int i = 0; i <= 100; ++i) {
        if (str[i] == '\000') {
            break;
        }
        char current = str[i];
        int toChangePossiton = 0;
        if (i + l <= lastPossition) {
            toChangePossiton = i + l;
        }
        else {
            toChangePossiton = ((i + l) - lastPossition) - 1;
        }
        char updeated = current + m;
        str2[toChangePossiton] = updeated;
    }
    cout << str2;
}