indexing - Why array indexes are zero based in most programming languages?

Question

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

C++, C#, C, D, Java,... are zero based.

Matlab is the only language I know that begin at 1.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…

1.0k views

1 Answer

深蓝 · Answer 1 · 2021-10-16T23:50:07+0000

Arrays are zero based in c and c++ as the represent the offset from the beginning of the list of the item.

These two lines have identical result in c.

anArray[3] = 4;
*(anArray +3) = 4;

The first is the standard indexer the second takes the pointer adds three to id and then dereffrences it. Which is the same as the indexer.