update array and str

Author: lulongfei

arrayone.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+
+int main()
+{
+    using namespace std;
+    int yams[3];
+
+    yams[0] = 7;
+    yams[1]= 8;
+    yams[2] = 6;
+
+    int yamcosts[3] = {20, 30, 5};
+
+    cout << "Total yams = ";
+    cout << yams[0] + yams[1] + yams[2] << " yams cost ";
+    cout << "The package with " << yams[1] << " yams costs ";
+    cout << yamcosts[1] << " cents per yam.\n";
+    int total = yams[0] * yamcosts[0] + yams[1] * yamcosts[1];
+    total = total + yams[2] * yamcosts[2];
+
+    cout << "The total yam expense is " << total << " cents.\n";
+    cout << "\nSize of yams array = " << sizeof yams;
+    cout << " bytes.\n";
+    cout << "Size of one element = " << sizeof yams[0];
+    cout << " bytes.\n";
+
+    return 0;
+}

instr1.cpp

@@ -0,0 +1,19 @@
+#include <iostream>
+
+int main()
+{
+    using namespace std;
+    const int ArSize = 20;
+    char name[ArSize];
+    char dessert[ArSize];
+
+    cout << "Enter your name:\n";
+    cin.getline(name, ArSize);
+    cout << "Enter your favorite dessert: \n";
+    cin.getline(dessert, ArSize);
+
+    cout << "I have some delicious " << dessert;
+    cout << " for you, " << name << ".\n";
+
+    return 0;
+}

typecast.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+
+int main()
+{
+    using namespace std;
+    int auks, bats, coots;
+    auks = 19.99 + 11.99;
+
+    bats = (int) 19.99 + (int) 11.99;
+    coots = int (19.99) + int (11.99);
+
+    cout << "auks = " << auks << ", bats = " << bats;
+    cout << ", coots = " << coots << endl;
+
+    char ch = 'Z';
+    cout << "The code for " << ch << " is ";
+    cout << int(ch) << endl;
+    cout << "Yes, the code is ";
+    cout << static_cast<int>(ch) << endl;
+
+    return 0;
+
+}