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Commit 6b2d4ba

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Exercise 24.10; Exercise 24.11; Exercise 24.12
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‎Chapter_24/C24_Exercise_24.10.cpp

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/* Exercise 24.10 */
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#include<iostream>
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#include<sstream>
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#include<iomanip>
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#include<vector>
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#include<random>
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#include"C24_Exercise_24.10.h"
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using namespace std;
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inline void error(string s) { throw runtime_error(s); }
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inline void error(const string& s, const string& s2) { error(s + s2); }
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inline void error(const string& s, int i) { ostringstream os; os << s << ": " << i; error(os.str()); }
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inline void keep_window_open() { char ch; cin >> ch; }
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int main()
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{
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enum Action {
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EXIT = -1, PRINTACTIONLIST,
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CASE1, CASE2, CASE3, CASE4, CASE5
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};
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const string actionList = "\tList of actions:\n"
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" (1) randint()\n"
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" (-1) Exit, (0) Print the list of actions\n";
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cout << actionList;
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int action;
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bool cond{ true };
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while (cond) try {
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cout << "\nPlease enter the action: ";
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if (!(cin >> action)) { ClearInput(cin); error("Error. Incorrect input"); }
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char ch;
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cin.get(ch);
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switch (action) {
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case CASE1: {
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cout << endl;
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cout << "Please enter the n (range [0,n]): ";
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int n;
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if (!(cin >> n)) { ClearInput(cin); error("Error. Incorrect input"); }
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cout << "Please enter the d (number of times): ";
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int d;
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if (!(cin >> d)) { ClearInput(cin); error("Error. Incorrect input"); }
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vector<int> randoms;
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randoms.resize(n + 1, 0);
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for (int i = 0; i < d; ++i) {
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++randoms[randint(n)];
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}
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cout << endl;
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for (int i = 0; i < randoms.size(); ++i) {
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cout << setw(3) << right << i << ") ";
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for (int j = 0; j < randoms[i]; ++j) {
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cout << '*';
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}
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cout << endl;
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}
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cout << vsp_2;
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break;
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}
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case PRINTACTIONLIST:
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cout << actionList;
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break;
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case EXIT:
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cond = false;
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break;
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default:
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error("Error. Incorrect action number");
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break;
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}
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}
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catch (runtime_error& e) {
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cerr << e.what() << endl;
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}
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catch (...) {
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cerr << "Error. Exception\n";
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return 1;
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}
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return 0;
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}
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void ClearInput(istream& is)
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{
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is.clear();
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is.ignore(numeric_limits<streamsize>::max(), '\n');
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}
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int randint(int min, int max)
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{
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static default_random_engine ran;
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return uniform_int_distribution<>{min, max}(ran);
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}
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int randint(int max)
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{
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return randint(0, max);
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}

‎Chapter_24/C24_Exercise_24.10.h

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/* Exercise 24.10 */
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using namespace std;
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const char* sp_2 = " ";
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const char* sp_4 = " ";
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const char* sp_6 = " ";
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const char* sp_8 = " ";
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const char* vsp_2 = "\n\n";
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const char* vsp_3 = "\n\n\n";
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const char* vsp_4 = "\n\n\n\n";
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void ClearInput(istream& is);
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int randint(int min, int max);
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int randint(int max);

‎Chapter_24/C24_Exercise_24.11.cpp

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/* Exercise 24.11 */
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#include<iostream>
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#include<sstream>
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#include<iomanip>
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#include"../Matrix/Matrix11.h"
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#include"../Matrix/MatrixIO11.h"
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#include"C24_Exercise_24.11.h"
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using namespace std;
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inline void error(string s) { throw runtime_error(s); }
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inline void error(const string& s, const string& s2) { error(s + s2); }
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inline void error(const string& s, int i) { ostringstream os; os << s << ": " << i; error(os.str()); }
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inline void keep_window_open() { char ch; cin >> ch; }
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int main()
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{
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enum Action {
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EXIT = -1, PRINTACTIONLIST,
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CASE1, CASE2, CASE3, CASE4, CASE5
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};
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const string actionList = "\tList of actions:\n"
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" (1) swap_columns()\n"
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" (-1) Exit, (0) Print the list of actions\n";
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cout << actionList;
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int action;
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bool cond{ true };
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while (cond) try {
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cout << "\nPlease enter the action: ";
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if (!(cin >> action)) { ClearInput(cin); error("Error. Incorrect input"); }
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char ch;
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cin.get(ch);
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switch (action) {
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case CASE1: {
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cout << endl;
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int a[3][3] =
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{
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{1,2,3},
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{4,5,6},
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{7,8,9}
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};
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Numeric_lib::Matrix<int, 2> A(a);
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cout << "A =\n" << A << endl;
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A.swap_columns(1, 2);
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cout << endl << "A.swap_columns(2, 3);" << endl;
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cout << "A =\n" << A << endl;
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A.swap_columns(0, 2);
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cout << endl << "A.swap_columns(0, 2);" << endl;
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cout << "A =\n" << A << endl;
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cout << endl << endl;
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int b[3][5] =
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{
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{1,2,3,4,5},
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{11,12,13,14,15},
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{55,66,77,88,99}
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};
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Numeric_lib::Matrix<int, 2> B(b);
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cout << "B =\n" << B << endl;
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B.swap_columns(0, 4);
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cout << endl << "B.swap_columns(0, 4);" << endl;
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cout << "B =\n" << B << endl;
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B.swap_columns(2, 3);
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cout << endl << "B.swap_columns(2, 3);" << endl;
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cout << "B =\n" << B << endl;
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cout << vsp_2;
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break;
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}
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case PRINTACTIONLIST:
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cout << actionList;
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break;
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case EXIT:
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cond = false;
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break;
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default:
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error("Error. Incorrect action number");
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break;
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}
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}
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catch (runtime_error& e) {
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cerr << e.what() << endl;
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}
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catch (...) {
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cerr << "Error. Exception\n";
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return 1;
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}
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return 0;
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}
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void ClearInput(istream& is)
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{
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is.clear();
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is.ignore(numeric_limits<streamsize>::max(), '\n');
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}

‎Chapter_24/C24_Exercise_24.11.h

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/* Exercise 24.11 */
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using namespace std;
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const char* sp_2 = " ";
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const char* sp_4 = " ";
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const char* sp_6 = " ";
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const char* sp_8 = " ";
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const char* vsp_2 = "\n\n";
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const char* vsp_3 = "\n\n\n";
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const char* vsp_4 = "\n\n\n\n";
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void ClearInput(istream& is);

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