modified and added

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.1 Character Testing/10-1.cpp

@@ -0,0 +1,26 @@
+// This program demonstrated som character-testing functions.
+#include <iostream>
+#include <cctype>
+using namespace std;
+
+int main()
+{
+    char input;
+
+    cout << "Enter any character: ";
+    cin.get(input);
+    cout << "The character you entered is: " << input << endl;
+
+    if (isalpha(input))
+        cout << "That's an alphabetic character.\n";
+    if (isdigit(input))
+        cout << "That's a numeric digit.\n";
+    if (islower(input))
+        cout << "The letter you entered is lowercase.\n";
+    if (isupper(input))
+        cout << "The letter you entered is uppercase.\n";
+    if (isspace(input))
+        cout << "That's a whitespace character.\n";
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.1 Character Testing/10-2.cpp

@@ -0,0 +1,49 @@
+// This program tests a customer number to determine whether 
+// it is in the proper format
+#include <iostream>
+#include <cctype>
+using namespace std;
+
+// Function prototype
+bool testNum(char[], int);
+
+int main()
+{
+    const int SIZE = 8;
+    char customer[SIZE];
+
+    // Get the customer number.
+    cout << "Enter a customer number in the form ";
+    cout << "LLLNNNN\n";
+    cout << "(LLL = letters and NNNN = number): ";
+    cin.getline(customer, SIZE);
+
+    // Determine whether it is valid.
+    if (testNum(customer, SIZE))
+        cout << "That's a valid customer number.\n";
+    else
+    {
+        cout << "That is not the proper format of the "
+             << "customer number.\nHere is an example:\n"
+             << "    ABC1234\n";
+    }
+    return 0;
+}
+bool testNum(char custNum[], int size)
+{
+    int count;
+
+    for (count = 0; count < 3; count++)
+    {
+        if (!isalpha(custNum[count]))
+            return false;
+    }
+
+    for (count = 3; count < size - 1; count++)
+    {
+        if (!isdigit(custNum[count]))
+            return false;
+    }
+
+    return true;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.2 Character Case Conversion/10-3.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <cctype>
+#include <iomanip>
+using namespace std;
+
+int main()
+{
+    const double PI = 3.14159;
+    double radius;
+    char goAgain;
+
+    cout << "This program calculates the area of a circle.\n";
+    cout << fixed << setprecision(2);
+
+    do
+    {
+        cout << "Enter the circle's radius: ";
+        cin >> radius;
+        cout << "The area is " << (PI * radius * radius);
+        cout << endl;
+
+        cout << "Calculate another? (Y or N) ";
+        cin >> goAgain;
+
+        while (toupper(goAgain) != 'Y' && toupper(goAgain) != 'N')
+        {
+            cout << "Please enter Y or N: ";
+            cin >> goAgain;
+        }
+
+    } while (toupper(goAgain) == 'Y');
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.3 C-String/10-4.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+    char again;
+
+    do
+    {
+        cout << "C++ programming is great fun!" << endl
+             << "Do you want to see the message again? ";
+        cin >> again;
+
+    } while (again == 'Y' || again == 'y');
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.3 C-String/10-5.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+    const int SIZE = 80;
+    char line[SIZE];
+    int count = 0;
+
+    cout << "Enter a sentence of no more than "
+         << (SIZE - 1) << " characters:\n";
+    cin.getline(line, SIZE);
+
+    cout << "The sentence you entered is:\n";
+    while (line[count] != '\0')
+    {
+        cout << line[count];
+        count++;
+    }
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.4 Library Functions for Working with C-Strings/10-6.cpp

@@ -0,0 +1,39 @@
+// This program uses the strstr function to search an array.
+#include <iostream>
+#include <cstring>  // For strstr
+using namespace std;
+
+int main()
+{
+    const int NUM_PRODS = 5;
+    const int LENGTH = 27;
+
+    char products[NUM_PRODS][LENGTH] =
+                    { "TV327 31-inch Television",
+                      "CD257 CD Player",
+                      "TA677 Answering Machine",
+                      "CS109 Car Stereo",
+                      "PC955 Personal Computer" };
+
+    char lookUp[LENGTH];
+    char *strPtr = nullptr;
+    int index;
+
+    cout << "\tProduct Database\n\n"
+         << "Enter a product number to search for: ";
+    cin.getline(lookUp, LENGTH);
+
+    for (index = 0; index < NUM_PRODS; index++)
+    {
+        strPtr = strstr(products[index], lookUp);
+        if (strPtr != nullptr)
+            break;
+    }
+
+    if (strPtr != nullptr)
+        cout << products[index] << endl;
+    else
+        cout << "No matching product was found.\n";
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.4 Library Functions for Working with C-Strings/10-7.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main()
+{
+    const int LENGTH = 40;
+    char firstString[LENGTH], secondString[LENGTH];
+
+    cout << "Enter a string: ";
+    cin.getline(firstString, LENGTH);
+    cout << "Enter another string: ";
+    cin.getline(secondString, LENGTH);
+
+    if (strcmp(firstString, secondString) == 0)
+        cout << "You entered the same string twice.\n";
+    else
+        cout << "The strings are not the same.\n";
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.4 Library Functions for Working with C-Strings/10-8.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+#include <cstring>
+#include <iomanip>
+using namespace std;
+
+int main()
+{
+    const double A_PRICE = 99.0,
+                 B_PRICE = 199.0;
+
+    const int PART_LENGTH = 9;
+    char partNum[PART_LENGTH];
+
+    cout << "The MP3 player part numbers are:\n"
+         << "\t16 Gigabyte, part number S147-29A\n"
+         << "\t32 Gigabyte, part number S147-29B\n"
+         << "Enter the part number of the MP3 player you\n"
+         << "wish to purchase: ";
+
+    cin >> partNum;
+
+    cout << showpoint << fixed << setprecision(2);
+    if (strcmp(partNum, "S147-29A") == 0)
+        cout << "The price is $" << A_PRICE << endl;
+    else if (strcmp(partNum, "S147-29B") == 0) 
+        cout << "The price is $" << B_PRICE << endl;
+    else 
+        cout << partNum << " is not a valid part number.\n";
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.4 Library Functions for Working with C-Strings/10-9.cpp

@@ -0,0 +1,24 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main()
+{
+    const int NAME_LENGTH = 30;
+    char name1[NAME_LENGTH], name2[NAME_MAX];
+
+    cout << "Enter a name (last name first): ";
+    cin.getline(name1, NAME_LENGTH);
+    cout << "Enter another name: ";
+    cin.getline(name2, NAME_LENGTH);
+
+    cout << "Here are the names sorted alphabetically:\n";
+    if (strcmp(name1, name2) < 0)
+        cout << name1 << endl << name2 << endl;
+    else if (strcmp(name1, name2) > 0)
+        cout << name2 << endl << name1 << endl;
+    else
+        cout << "You entered the same name twice!\n";
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.5 String Numeric Conversion Functions/10-10.cpp

@@ -0,0 +1,32 @@
+#include <iostream>
+#include <cctype>
+#include <string>
+using namespace std;
+
+int main()
+{
+    string input;
+    int total = 0,
+        count = 0;
+    double average;
+
+    cout << "This program will average a series of numbers.\n"
+         << "Enter the first number or Q to quite: ";
+    getline(cin, input);
+
+    while(tolower(input[0]) != 'q')
+    {
+        total += stoi(input);
+        count++;
+        cout << "Enter the next number of Q to quit: ";
+        getline(cin, input);
+    }
+
+    if (count != 0)
+    {
+        average = static_cast<double>(total) / count;
+        cout << "Average: " << average << endl;
+    }
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.5 String Numeric Conversion Functions/10-11.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include <string>
+#include <iomanip>
+using namespace std;
+
+int main()
+{
+    string input,
+           name;
+    int idNumber,
+        age;
+    double income;
+
+    cout << "What is your ID number? ";
+    getline(cin, input);
+    idNumber = stoi(input);
+
+    cout << "What is your name? ";
+    getline(cin, name);
+
+    cout << "What is your age? ";
+    getline(cin, input);
+    age = stoi(input);
+
+    cout << "What is your annual income? ";
+    getline(cin, input);
+    income = stod(input);
+
+    cout << setprecision(2) << fixed << showpoint;
+    cout << "Your name is " << name
+         << ", your are "   << age
+         << " years old, \nand you make $"
+         << income << " per year.\n";
+
+
+    return 0;
+}

Chapter-10-Characters-C-Strings-and-More-about-the-string-Class/10.6 Focus on Software Engineering: Writing Your Own C-string-Handling Functions/10-12.cpp

@@ -0,0 +1,33 @@
+#include <iostream>
+using namespace std;
+
+void stringCopy(char[], char[]);
+
+int main()
+{
+    const int LENGTH = 5;
+    char first[LENGTH],
+         second[LENGTH];
+
+    cout << "Enter a string with no more than "
+         << (LENGTH - 1) << " characters:\n";
+    cin.getline(first, LENGTH);
+
+    stringCopy(first, second);
+
+    cout << "The string you entered is:\n" << second << endl;
+
+    return 0;
+}
+void stringCopy(char string1[], char string2[])
+{
+    int index = 0;
+
+    while (string1[index] != '\0')
+    {
+        string2[index] = string1[index];
+        index++;
+    }
+
+    string2[index] = '\0';
+}