Test loop and input error checking 2.

Fix issue with error checking.

main.cpp

@@ -1,21 +1,60 @@
 #include <iostream>
 
-int getValue()
+using string = std::string;
-{
+void ignoreTillLineEnd();
-    std::cout << "Enter an integer: ";
+string promptfs(string);
-
+int promptfi(string);
-    int x{};
-    std::cin >> x;
-    return x;
-}
 
 int main()
 {
-    int a{ getValue() };
+    int nameC {promptfi("Enter the number of names:")};
-    int b{ getValue() };
+    if (nameC < 1) {
-    int c{ getValue() };
+        std::cout << "No names to be entered!\n";
-
+        return 1;
-    std::cout << a + (b * c); // order of eval doesn't matter now
+    }
-
+    string* names = new string[nameC];
+    for (int i = 0; i < nameC; i++) names[i] = promptfs("Enter your name:");
+    std::cout << "I have " << nameC << " to say hello to!\n";
+    for (int i = 0; i < nameC; i++) std::cout << "Hello " << names[i] << ".\n";
     return 0;
 }
+
+void ignoreTillLineEnd() {
+    std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+}
+
+string promptfs(string msg) {
+    bool once {false};
+    string toret {};
+    do {
+        if (once) {
+            std::cin.clear();
+            ignoreTillLineEnd();
+            std::cout << "Input Failure!\n";
+        }
+        std::cout << msg << "\n";
+        std::cin >> toret;
+        once = true;
+    }
+    while (std::cin.fail());
+    ignoreTillLineEnd();
+    return toret;
+}
+
+int promptfi(string msg) {
+    bool once {false};
+    int toret {};
+    do {
+        if (once) {
+            std::cin.clear();
+            ignoreTillLineEnd();
+            std::cout << "Input Failure!\n";
+        }
+        std::cout << msg << "\n";
+        std::cin >> toret;
+        once = true;
+    }
+    while (std::cin.fail());
+    ignoreTillLineEnd();
+    return toret;
+}