c 2b 2b initialize array

1int nums[100] = {0}; // initiallize all values to 0
2
3int nums[5] = {1,2,3,4,5};
4
5// type name[size] = {values};

1int* a = NULL;   // Pointer to int, initialize to nothing.
2int n;           // Size needed for array
3cin >> n;        // Read in the size
4a = new int[n];  // Allocate n ints and save ptr in a.
5for (int i=0; i<n; i++) {
6    a[i] = 0;    // Initialize all elements to zero.
7}
8. . .  // Use a as a normal array
9delete [] a;  // When done, free memory pointed to by a.
10a = NULL;     // Clear a to prevent using invalid memory reference.
11

1#include <iostream>
2using std::cout;
3
4int a[] = { 1, 2, 3, 4, 5 };
5int counta()
6  {
7  return sizeof( a ) / sizeof( a[ 0 ] );  // works, since a[] is an array
8  }
9
10int countb( int b[] )
11  {
12  return sizeof( b ) / sizeof( b[ 0 ] );  // fails, since b[] is a pointer
13  }

1int foo [] = { 16, 2, 77, 40, 12071 };

1int nCount[] = {1, 2, 3, 4, 5};

1int arr[3] = {1, 5, 4};