Differences between Java and C/CPP

1. Array

Java declares that the array size is not required or cannot be specified (specified when heap memory is allocated)

Int sortnum [] = {23, 45, 12,102, 54,325, 57, 32 };

Int TDA [] [] = {1, 2, 3}, {4, 5}, {6, 7, 8, 9 }};

C/CPP can specify or not specify the size when initializing the Array

Int array [] = {, 4}; int TDA [] [4] = {1, 2, 3}, {}, {6, 7, 8, 9 }};

Java two-dimensional arrays can have different lengths in each line.

TDA [I]. Length = 3123tda [I]. Length = 245tda [I]. Length = 46789.