update,

_prompts/step1/step1.md

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+write a cpp function:
+
+This system collects student details like name, marks in each subject.
+
+using cpp, write a console program:
+that accepts user input
+  - name,
+  - maths marks,
+  - chinese marks,
+  - english marks and
+  - grade,
+
+loop until user enter "END" as name input
+print them out when the user input done
+
+
+