update,

marissa.sam/_poc/helloworld.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    // Prompt the user to enter their name
+    cout << "Please enter your name: ";
+    string name;
+    cin >> name;
+
+    // Prompt the user to enter their math, Chinese, and English marks
+    float mathMark, chineseMark, englishMark;
+    cout << "Please enter your math mark: ";
+    cin >> mathMark;
+    cout << "Please enter your Chinese mark: ";
+    cin >> chineseMark;
+    cout << "Please enter your English mark: ";
+    cin >> englishMark;
+
+    // Calculate the average mark
+    float averageMark = (mathMark + chineseMark + englishMark) / 3;
+
+    // Determine the grade based on the average mark
+    char grade;
+    if (averageMark >= 90) {
+        grade = 'A';
+    } else if (averageMark >= 80) {
+        grade = 'B';
+    } else if (averageMark >= 70) {
+        grade = 'C';
+    } else if (averageMark >= 60) {
+        grade = 'D';
+    } else {
+        grade = 'F';
+    }
+
+    // Print the results
+    cout << endl << "Name: " << name;
+    cout << endl << "Math Mark: " << mathMark;
+    cout << endl << "Chinese Mark: " << chineseMark;
+    cout << endl << "English Mark: " << englishMark;
+    cout << endl << "Average Mark: " << averageMark;
+    cout << endl << "Grade: " << grade << endl;
+
+    return 0;
+}