The establishment of dynamic array in C language

The creation of a one-dimensional dynamic array, which is relatively simple, directly on the code

1 #define_crt_secure_no_deprecate2#include <stdio.h>3#include <stdlib.h>4 voidCreateonedimensionalvector () {5     intn, I;6     int*arr;7scanf"%d",&n);8Arr = (int*)malloc(sizeof(int)*n);9      for(i =0; I < n; i++)TenArr[i] =i; One      for(i =0; I < n; i++) Aprintf"%d\t", Arr[i]); - } -  the intMain () { - createonedimensionalvector (); -  -     return 0; +}

Creation of two-dimensional dynamic arrays

1 voidCreatetwodimensionalvector () {2     intn=3, m=4;3     int**A;4A = (int**)malloc(sizeof(int*) *n);//create an array of pointers to assign the address of the array of pointers to a5      for(inti =0; I < n; i++)6A[i] = (int*)malloc(sizeof(int) *m);//allocating space to the second dimension7 8      for(inti =0; I < n; i++){9          for(intj =0; J < M; J + +)TenA[I][J] = i +J; One     } A  -      for(inti =0; I < n; i++){ -          for(intj =0; J < M; J + +) theprintf"%d\t", A[i][j]); -printf"\ n"); -     } - } + intMain () { - createtwodimensionalvector (); +  A     return 0; at}

The establishment of dynamic array in C language