Differences

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--- cplusplus:selection_examples [2013/02/03 02:53] – mithat
+++ cplusplus:selection_examples [2013/02/08 01:59] – [validating input] mithat
@@ Line 15: / Line 15: @@
     if (grade > 60)
-        cout << "Passed!" << endl;
+        cout << "Passed" << endl;
     return 0;
@@ Line 56: / Line 56: @@
     cout << "The student received a letter grade of ";
-    if ( grade >= 90 )
+    if (grade >= 90 )
         cout << "A";
-    else if ( grade >= 80 )
+    else if (grade >= 80)
         cout << "B";
-    else if ( grade >= 70 )
+    else if (grade >= 70)
         cout << "C";
-    else if ( grade >= 60 )
+    else if (grade >= 60)
         cout << "D";
     else
         cout << "F";
     cout << "." << endl;
+    return 0;
+}
+</file>
+===== validating input =====
+<file c++ validating_input_example.cpp>/* Using logical operators to validate input */
+#include <iostream>
+using namespace std;
+int main()
+{
+    int grade;
+    cout << "Enter a numerical grade, and I will tell you" << endl;
+    cout << "how well the student performed: ";
+    cin >> grade;    // read an integer
+    if (grade >= 0 && grade <= 100)
+    {
+        cout << "The student received a letter grade of ";
+        if (grade >= 90 )
+            cout << "A";
+        else if (grade >= 80)
+            cout << "B";
+        else if (grade >= 70)
+            cout << "C";
+        else if (grade >= 60)
+            cout << "D";
+        else
+            cout << "F";
+        cout << "." << endl;
+    }
+    else
+        cout << "The grade must be between 0 and 100." << endl;
     return 0;
 }</file>