本文探討有關電腦基礎課程的計算機程式之教學中，使用C/C++語言來宣告陣列變數時，由於各種版本之C/C++編譯程式，都未對陣列變數的註標值，進行資料範圍的檢驗[1][2]，因此程式設計者必須自行撰寫註標值之範圍檢驗的段落敘述，以防止註標值越界所造成的邏輯錯誤，C++包含了C的大部份功能，而且又發展了不少新的指令使用法，本文擬將檢驗註標值範圍的程式設計方法，做C與C++之比較，最後並使用物件導向技術，處理這個問題。

This article discusses something about computer programming. None of the versions of C/C++ compilers has the functions to examine the data range for the indexes of the array variables. Therefore, when programmers declare the array variables in C/C++, they have to program some paragraphs about examining the data range so as to prevent the logic errors in overloading of the indexes. C++ includes C in most of functions, and has been developed many new commands. This article intends to compare C with C++ in examining the data range for the indexes of the array variables, and finally, use the object-oriented programming technique to deal with the above mentioned problems.