The difference between an array in C # and an array in C + +

difference | Arrays in C # are reference types, and C # defines an integer array by: int [] Intarray = {1,2,3}; or int [] Intarray = new int[10]; and in C + +, the integer array is defined as an int intarray[] = {1 , 2,3}; or int * Intarray = new INT[10]; The arrays in C # can be one-dimensional or multidimensional, and also support matrices and jagged arrays. Note: The way to define multidimensional arrays (matrices) is [,,] and the way you define multidimensional "jagged matrices" is []. In addition, the use of the new keyword does not necessarily mean that the object is dynamically allocated (into the stack). The following are common definitions of multidimensional arrays in C # (one-dimensional): int []a1;  //define one-dimensional array int [,]a2; //define two-dimensional array int [,,]a3; Define three-dimensional array int []A1 = new int [10];      //define one-dimensional array depth int [,]A2 = new int [10,20];  &N bsp; //Defines a two-dimensional array depth int [,,]a3 = new int [10,20,30]; Define three-bit array depth int []A1 = new int []{1,2,3};      //init int [,]A2 = new int [,]{{1,2,3},{4,5,6}} You can also define "jagged" arrays: int [][]var = new int [3][];var[0] = new Int[]{1,2,3};var[1] = new Int[]{1,2,3,4,5,6};var[2] = new Int[]{1 , 2,3,4,5,6,7,8,9}; Note that the difference between int [,]a, and int [][]a: The former defines a two-dimensional fixed array, which defines a two-dimensional mutable array. But none of them have been allocated space and initialized. int [][]var = new int[3][4]; it's wrong. The following error: Class test{static void F (int []arr) {}static void Main () {f ({1,2,3});/Error! {1,2,3} is not a valid expression. }} The following is correct: class TEST{STATCI void F (int []arr) {}static void Main () {f (new int []{1,2,3});}}